GuitarModels/CFTubes.scad

include <common.scad>
include <UBassTuner.scad>
include <NylonTuner.scad>

include <CFTubes/common.scad>
// Choose your material by only including one of the below
// include <CFTubes/PLA.scad>
// include <CFTubes/PETG.scad>
include <CFTubes/ABS.scad>
include <EllipticalNeck.scad>

// Guitar_Scale_Length_mm = 610;  // millimetres, slightly over 24inch (609.6mm) Jaguar scale, should be fine for guitar and u-bass
// assert(fret_scale_length(0) == 610);  // Make sure the function correctly uses our changed global

// Philippians 4:8
// Gideon (ShinKaiYaku07) 真実な, 尊ぶべき, 正しい, 清い, 愛すべき, 評判の良い, 徳とされる, 称賛に値する
// ShinKaiYaku65 最後に、兄弟たち。すべての真実なこと、すべての誉れあること、すべての正しいこと、すべてのきよいこと、すべての愛すべきこと、すべての評判の良いこと、そのほか徳と言われること、称賛に値することがあるならば、そのようなことに心を留めなさい。
// I swapped 愛 and 評判 because 12th fret should be the biggest marker, and having only 15 as a 2char marker would be too disorienting
// going with 良 for 21
fret_inlays = [[3, "真"], [5, "尊"], [7, "正"], [9, "清"], [12, "評判"], [15, "愛"], [17, "徳"], [19, "賛"], [21, "良"], [24, "主イエス"]];
// Galatians 5:22-23
// ShinKaiYaku65 22しかし、御霊の実は、愛、喜び、平安、寛容、親切、善意、誠実、 23柔和、自制です。このようなものを禁ずる律法はありません。
// 愛  喜び  平安  寛容  親切  善意  誠実  柔和  自制

module tailpiece(string_spacing=18, string_margin=4.5, num_strings=3, target_neck_thickness=15, scallop_depth=3, fret_width=2.4*6) {
	fw2 = fret_width/2;
	neck_length = 84;
	neck_width = (num_strings-1)*string_spacing + string_margin*2 + 6 + 6;
	module neck_stock() {
		angle_excess = asin((scallop_depth+fw2)/target_neck_thickness);
		a0 = 90-angle_excess;
		a1 = 270+angle_excess;
		rotate([-90, 0, 0])
			linear_extrude(neck_length)
			polygon([for (i = [0:300]) let(a=lerp(a0, a1, i/300.0)) [neck_width*0.5*sin(a), -target_neck_thickness*cos(a)]]);
	}
	module scallop(fret) {
			x0 = fret_scale_length(fret-1) - fw2;
			x1 = fret_scale_length(fret) + fw2;
			xmid = lerp(x0, x1, 0.5);
			// Radius it?
			arc = arc_points([[x0, scallop_depth], [x1, scallop_depth], [xmid, 0]]);
			// echo(arc);
			rotate([90, 0, 90]) linear_extrude(neck_width, center=true) polygon(arc);
	}
	module fret_bumps() {
		translate([0, neck_length-fw2, scallop_depth]) rotate([0, 90]) cylinder(d=fret_width, h=neck_width, center = true, $fn=200);
	}

	module differences() {
		t_offset = -30; //2.7;
		t_z = -25; //-23;

		module tuner() {
			hole_r = 3;
			bend_r = 24 + hole_r + 10;
			fn=72;
			rotate([90, -90, 90]) UBassTuner(from_below=true, from_side=true);
			// translate([35,16,0]) cylinder(h=10-t_z, d=7, $fn=72);
			translate([36-7,7,1]) for (a = [10:89]) {
				hull() {
					translate([a/9, bend_r-bend_r*sin(a), bend_r*cos(a)]) sphere(hole_r, $fn=fn);
					translate([(a+1)/9, bend_r-bend_r*sin(a+1), bend_r*cos(a+1)]) sphere(hole_r, $fn=fn);
					translate([7, bend_r-bend_r*sin(a+1), bend_r*cos(a+1)]) sphere(hole_r, $fn=fn);
				}
			}
		}
		                translate([t_offset, 49, t_z]) tuner();
		mirror([1,0,0]) translate([t_offset, 27, t_z]) tuner();
		                translate([t_offset,  5, t_z]) tuner();
			for (i = [-1:2:1])
				translate([i*15, 0, -4])
				CFTubeCutout(neck_length, 0, tolerance=0.4);
			translate([0, 0, -10])
				CFTubeCutout(neck_length, 0, tolerance=0.4);
	}
	thick = 34;
	render() difference() {
		color([1,1,1,0.7]) translate([-neck_width/2, 0, -thick]) round_cube([neck_width, neck_length, thick], 4);
		differences();
	}
	// color([1,1,1,0.3]) neck_stock();
}

module fret_tube(from_fret, to_fret, fret_width=2.4) {
	fw2 = fret_width/2;
	x0 = fret_scale_length(0)+fw2;
	x1 = fret_scale_length(from_fret) + ((from_fret==0) ? fw2 : (-fw2));
	x2 = fret_scale_length(to_fret)-fw2;
	render() difference() {
		neck(fret_width=fret_width);
		for (i = [-1:2:1])
			translate([i*15, 0, -4])
			CFTubeCutout(x1, x2);
		for (i = [-1:2:1])
			translate([i*7.5, 0, -7])
			CFSquareCutout(x1, x2);
		translate([0, 0, -10])
			CFTubeCutout(x1, x2);

		translate([-50, 0, -50]) cube([100, x2, 100]);
		translate([-50, x1, -50]) cube([100, x0-x1, 100]);

		// αβγδεζ
		rotate([90, 0, 0]) linear_extrude((x2+0.3)*2, center=true)  text(text = "01β", font = "Deja Vu Sans", halign = "center", valign = "center", size = 4);
	}
}

module fret_tube_filler(from_fret, to_fret, fret_width=2.4, belthole_length=140, VLH=true) {
	fw2 = fret_width/2;
	x0 = fret_scale_length(0)+fw2;
	x1 = fret_scale_length(from_fret) + ((from_fret==0) ? fw2 : (-fw2));
	x2 = (to_fret < 100) ? (fret_scale_length(to_fret)-fw2) : 0;
	render() difference() {
		neck(fret_width=fret_width, filler=true);
		for (i = [-1:1])
			translate([i*15, 0, (i==0)?(-10):(-4)])
			CFTubeCutout(x1, x2, VLH=VLH);

		translate([-50, 0, -50]) cube([100, x2, 100]);
		translate([-50, x1, -50]) cube([100, x0-x1, 100]);

		// Add a belt hole
		arc = arc_points([[16, -20], [-16, -20], [0, -4]]);
		belthole_r = 2.5;
		belthole_fn = 72;
		belthole_x0 = x1-belthole_r-5;
		belthole_x1 = belthole_x0 - belthole_length;
		render() for (i = [0:len(arc)-2]) {
			hull() {
				translate([arc[i][0], belthole_x0, arc[i][1]]) sphere(belthole_r, $fn=belthole_fn);
				translate([arc[i+1][0], belthole_x0, arc[i+1][1]]) sphere(belthole_r, $fn=belthole_fn);
				translate([arc[i][0], belthole_x1, arc[i][1]]) sphere(belthole_r, $fn=belthole_fn);
				translate([arc[i+1][0], belthole_x1, arc[i+1][1]]) sphere(belthole_r, $fn=belthole_fn);
			}
		}

		// αβγδεζ
		t = "01β.β";
		translate([0,0,-3.5]) rotate([90, 0, 0]) linear_extrude((x2+0.3)*2, center=true)  text(text = t, font = "Deja Vu Sans", halign = "center", valign = "center", size = 4);
		translate([0,x1-0.3,-3]) rotate([90, 0, 180]) linear_extrude((0.3)*2, center=true)  text(text = t, font = "Deja Vu Sans", halign = "center", valign = "center", size = 4);
	}
}

module headpiece(string_spacing=18, string_margin=4.5, num_strings=3, target_neck_thickness=15, scallop_depth=3, fret_width=2.4) {
	headpiece_length = 36;
	cf_square_length = 32;
	fw2 = fret_width/2;
	x0 = fret_scale_length(0)+fw2;
	neck_width = (num_strings-1)*string_spacing + string_margin*2;
	bend_radius = 24;

	module stock() {
		angle_excess = asin(scallop_depth/target_neck_thickness);
		a0 = 90-angle_excess;
		a1 = 270+angle_excess;
		translate([0, x0, 0])
			rotate([-90, 0, 0])
				linear_extrude(headpiece_length)
				polygon([for (i = [0:300]) let(a=lerp(a0, a1, i/300.0)) [neck_width*0.5*sin(a), -target_neck_thickness*cos(a)]]);
	}
	module string_tubes(tolerance = 1.0) {
		string_thicknesses = [4.9, 4.2, 3.0];
		module string_tube(diameter, fn=36) {
			hole_r = diameter/2;
			bend_r = bend_radius + hole_r;
			union() {
				for (a = [0:89]) {
					hull() {
						translate([0, bend_r*sin(a), bend_r*cos(a)]) sphere(hole_r, $fn=fn);
						translate([0, bend_r*sin(a+1), bend_r*cos(a+1)]) sphere(hole_r, $fn=fn);
					}
				}
				hull() {
					translate([0, bend_r*sin(90), bend_r*cos(90)]) sphere(hole_r, $fn=fn);
					translate([0, bend_r*sin(90), -target_neck_thickness]) sphere(hole_r, $fn=fn);
				}
			}
		};
		for (i = [0:num_strings-1]) {
			string_diameter = string_thicknesses[i] + tolerance;
			x = -neck_width/2 + string_margin + (i*string_spacing);
			translate([x, x0+2, -bend_radius+scallop_depth]) string_tube(string_diameter);
		}
	}
	difference() {
		stock();
		string_tubes();
		for (i = [-1:2:1])
			translate([i*7.5, 0, -7])
				CFSquareCutout(x0+cf_square_length, x0, taper_x1=false);
		// αβγδεζ
		translate([0, x0+headpiece_length, -5]) rotate([90, 0, 180]) linear_extrude(0.3, center=true)  text(text = "01β.γ", font = "Deja Vu Sans", halign = "center", valign = "center", size = 4);
	}
}

module bridge(string_spacing=18, string_margin=4.5, num_strings=3, target_neck_thickness=15, scallop_depth=3, fret_width=2.4) {
	piece_length = 16;
	cf_square_length = 32;
	fw2 = fret_width/2;
	x0 = 0;
	neck_width = (num_strings-1)*string_spacing + string_margin*2;
	bend_radius = 24;
	string_thicknesses = [4.9, 4.2, 3.0];

	module stock() {
		angle_excess = asin(scallop_depth/target_neck_thickness);
		a0 = 90-angle_excess;
		a1 = 270+angle_excess;
		translate([0, x0, 0])
			rotate([-90, 0, 0])
				linear_extrude(piece_length)
				polygon([for (i = [0:300]) let(a=lerp(a0, a1, i/300.0)) [neck_width*0.5*sin(a), -target_neck_thickness*cos(a)]]);
		intersection() {
			r = 14;
			translate([0,8,scallop_depth]) rotate([18, -90, 0]) scale([1,0.2,1]) cylinder(r=r, h=neck_width*1.5, center=true, $fn=72);
			a0 = -90;
			a1 = 90;
			translate([0, x0, 0])
				rotate([-90, 0, 0])
					linear_extrude(piece_length)
					polygon([for (i = [0:300]) let(a=lerp(a0, a1, i/300.0)) [neck_width*0.5*sin(a), -target_neck_thickness*cos(a)*3]]);
		}
	}
	module string_tubes(tolerance = 1.0) {
		module string_tube(diameter, fn=36) {
			hole_r = diameter/2;
			bend_r = bend_radius + hole_r;
			union() {
				for (a = [0:89]) {
					hull() {
						translate([0, bend_r*sin(a), bend_r*cos(a)]) sphere(hole_r, $fn=fn);
						translate([0, bend_r*sin(a+1), bend_r*cos(a+1)]) sphere(hole_r, $fn=fn);
					}
				}
				hull() {
					translate([0, bend_r*sin(90), bend_r*cos(90)]) sphere(hole_r, $fn=fn);
					translate([0, bend_r*sin(90), -target_neck_thickness]) sphere(hole_r, $fn=fn);
				}
			}
		};
		for (i = [0:num_strings-1]) {
			string_diameter = string_thicknesses[i] + tolerance;
			x = -neck_width/2 + string_margin + (i*string_spacing);
			// translate([x, x0+2, -bend_radius+scallop_depth]) string_tube(string_diameter);
			translate([x, 0, scallop_depth+string_diameter/2+8]) rotate([-90,0,0]) cylinder(d=string_diameter, h=20, $fn=72);
		}
	}
		// string_tubes();
	difference() {
		stock();
		string_tubes();
		for (i = [-1:1])
			translate([i*15, 0, (i==0)?(-10):(-4)])
				CFTubeCutout(piece_length+0.1, x0-0.1, VLH=false);
		// αβγδεζ
		translate([0, x0+piece_length, -5]) rotate([90, 0, 180]) linear_extrude(0.3, center=true)  text(text = "01β", font = "Deja Vu Sans", halign = "center", valign = "center", size = 4);
	}
}

module Nylon6String(render_colour_0=true, render_colour_1=true, render_colour_2=true, render_colour_3=true, from_fret=0, to_fret=1, reference=false) {
	colour_0 = "blue";
	colour_1 = "white";  // fret layers
	colour_2 = "green";  // side markers
	colour_3 = "yellow";  // inlays
	id_line_0 = "PETG";
	id_line_1 = "1δ.α";
	fsl_mm = fret_scale_length(0);

	// string_diameters_thous = [28, 32, 40, 30, 36, 42];  // Ernie Ball Earthwoods (seemingly counterfeit from Amazon)
	string_diameters_thous = [28, 32, 40, 30, 35, 43];  // Artist CLST Classical Nylon Guitar Strings
	string_diameters_mm = string_diameters_thous * 0.0254;

	num_frets = 21;
	num_strings = 6;
	// 56mm wide neck
	string_spacing = 10;  // 50mm E to e
	string_margin = 3;  // +6
	neck_width = string_spacing*(num_strings-1) + string_margin*2;
	body_width = 96;
	scallop_depth = 2.5;
	fret_width=2.4;
	target_neck_thickness = 16; //22;
	// echo(fret_scale_length(8));
	// echo(fret_scale_length(9));
	rx0 = -40;  // Reinforcing rods start
	rx1 = rx0+280;

	// target_neck_thickness_additional_points = [];
	target_neck_thickness_additional_points = [[rx0+CF_Tube_Len+20, 22], [0, 22]];
	// target_neck_thickness_additional_points = [[400.025-fret_width/2, 22], [380, 25], [130, 42], [0, 42]];
	// target_neck_thickness_additional_points = [[400.025-fret_width/2, 22], [380, 25], [0, 25]];
	// target_neck_thickness_additional_points = [[400.025-fret_width/2, 22], [130, 42], [0, 42]];

	echo(str("Making a Nylon 6 String with scale length ", fsl_mm, "mm = ", fsl_mm/25.4, "in and neck width ", neck_width, "mm"));
	assert(fsl_mm == Classical_Short_Scale_mm);  // Make sure the function correctly uses our changed global

	function CF_Span_Coords(full_length = 700, ply = 3) = [for (i=[0:ply-1]) [0, lerp(0, full_length-CF_Tube_Len, i/(ply-1)), CF_Square_Width*i]];
	module CF_Span(full_length = 700, ply = 3, hole = true) {
		for (v = CF_Span_Coords(full_length, ply))
			translate(v) CFSquare(hole=hole);
	}
	module MyNeck(inlays_only=false, side_markers_only=false, fret_layers_only=false, engrave_markers=false, remove_fret_layers=false) {
		render() neck(num_frets=num_frets, num_strings=num_strings, string_margin=string_margin, string_spacing=string_spacing, scallop_depth=scallop_depth, target_neck_thickness=target_neck_thickness, target_neck_thickness_additional_points=target_neck_thickness_additional_points, inlays_only=inlays_only, side_markers_only=side_markers_only, fret_layers_only=fret_layers_only, engrave_markers=engrave_markers, remove_fret_layers=remove_fret_layers);
	}
	module MultiColourNeck() {
		if (render_colour_0) color(colour_0) MyNeck(engrave_markers=true, remove_fret_layers=true);
		if (render_colour_1) color(colour_1) MyNeck(fret_layers_only=true);
		if (render_colour_2) color(colour_2) MyNeck(side_markers_only=true);
		if (render_colour_3) color(colour_3) MyNeck(inlays_only=true);
	}

	reinforcing_tube_positions = flatten([
		[
			for (i=[-1,1]) each [
				// Headside reinforcement
				[i*21.5, rx1, -4],
				// Bridgeside reinforcement
				// [i*21.5, rx0, -4],
				[i*17.25, rx0, -10],
				// [i*17, rx0, -12],
				[i*3.95, rx0, -16.5],
			]
		],
		[
			// Headside reinforcement
			[0, rx1, -4],
			[0, rx1, -11],
			// Bridgeside reinforcement
			// [0, rx0, -11],
		]]);
	echo(reinforcing_tube_positions);
	// Through span construction
	span_coords = CF_Span_Coords(ply=2);
	reinforcing_square_positions = [
		for (i=[-1,1]) each [ for (v = span_coords) [i*10, rx0, -10] + v ]
	];
	echo(reinforcing_square_positions);


	// neck(num_frets=num_frets, num_strings=num_strings, string_margin=string_margin, string_spacing=string_spacing);
	// %neck(num_frets=num_frets, num_strings=num_strings, string_margin=string_margin, string_spacing=string_spacing, scallop_depth=scallop_depth, target_neck_thickness=target_neck_thickness);
	module NeckFragment(from_fret, to_fret, to_origin=true, include_from_fret=false, test_tolerances_piece=false) {
		x0 = fret_scale_length(to_fret) - fret_width/2;
		x1 = fret_scale_length(from_fret) + ((include_from_fret)?1:(-1)) * fret_width/2;
		xn = fsl_mm + fret_width;

		module TestTolerancesPiece() {
			for (m=[0,11]) mirror([m, 0, 0]) color([0.4, 0.5, 0.5]) translate([9, 0, -16+(CF_Square_Width*2)]) CFSquareCutout(x0, x1, taper_length=2);
			translate([ 12,0,-14]) CFSquareCutout(x0, x1, taper_length=2);
			translate([ 12-CF_Square_Width,0,-14]) CFSquareCutout(x0, x1-8, taper_length=2, taper_x2=false);
			translate([-12,0,-14]) CFSquareCutout(x0, x1, taper_length=2);
			translate([-12+CF_Square_Width,0,-14]) CFSquareCutout(x0+8, x1, taper_length=2, taper_x1=false);
			translate([20,0,-6]) CFTubeCutout(x0, x1, taper_length=2);
		}

		translate([0,to_origin ? -x0 : 0,0]) render() difference() {
			MultiColourNeck();
			color(colour_1) {
				translate([-100, 0, -100]) cube([200, x0, 200]);
				translate([-100, x1, -100]) cube([200, xn-x1, 200]);
				for (v = reinforcing_tube_positions) CFTubeCutout2(v, x0, x1);
				for (v = reinforcing_square_positions) CFSquareCutout2(v, x0, x1);
				if (test_tolerances_piece) TestTolerancesPiece();
			}
		}
	}

	// Test tolerances piece
	module TestTolerancesPiece() {
		difference(){
			NeckFragment(2, 3, test_tolerances_piece=true);
			translate([-20,0,-1]) rotate([-90,180,180]) linear_extrude(3, center=true) text(id_line_0, size=3.5, halign="center", valign="center");
			translate([-20,0,-6]) rotate([-90,180,180]) linear_extrude(3, center=true) text(id_line_1, size=3.5, halign="center", valign="center");
		}
	}
	// TestTolerancesPiece();

	module RealPiece(from_fret, to_fret, include_from_fret=false) {
		midpoint = (fret_scale_length(from_fret) - fret_scale_length(to_fret) + (include_from_fret ? fret_width : 0))/2;
		module IDText(thickness = 0.2, inset = 0, extra_line=str("F", to_fret)) {
			translate([0,0,-8]) rotate([-90,180,180]) translate([0,0,-thickness-inset]) linear_extrude(thickness) {
				text(str(id_line_0, id_line_1), size=2.25, halign="center", valign="center", $fn=100);
				translate([0,-3]) text(extra_line, size=2.25, halign="center", valign="center", $fn=100);
			}
		}
		module BackIDText(thickness = 0.2, inset = 0) {
			rotate_around([0,0,180], [0,midpoint,0])
				IDText(thickness, inset, str("F", from_fret));
		}
		render() difference(){
			NeckFragment(from_fret, to_fret, include_from_fret=include_from_fret);
			// Subtract from frets
			color("red") {
				IDText();
				if (include_from_fret) BackIDText();
			}
			color("red") BackIDText();
		}
		// // color("red") IDText(inset=0.0001);
		// if (render_colour_0) color(colour_1) IDText();
		// if (render_colour_0 && include_from_fret) color(colour_1) BackIDText();
		// if (render_colour_1 && !include_from_fret) color("red") BackIDText();
	}

	module HeadPiece() {
		x0 = fret_scale_length(0) + fret_width/2;
		end_radius = 12;
		x1 = x0 - rx0 + end_radius;
		module StringHoles() {
			for (i = [0:num_strings-1]) translate([(num_strings-i-1)*string_spacing - neck_width/2 + string_margin,0,0]) {
				translate([0,0,scallop_depth+fret_width/2+string_diameters_mm[i]]) rotate([-105,0,0]) cylinder(h=30, d=string_diameters_mm[i]*2, $fn=cyl_ld_fn);
				// translate([0,23,-4]) rotate([-150,0,0]) translate([0,0,0]) cylinder(h=20, d=4, $fn=cyl_ld_fn);
				hull() {
					translate([0,29,-3.5]) sphere(d=5.5, $fn=360);
					translate([0,29+11,-17]) sphere(d=7, $fn=360);
				}
			}
		}
		render() difference(){
			hull() {
				translate([0,fret_width/2,0]) scale([neck_width/2, 0.01, target_neck_thickness]) sphere(r=1, $fn=360);
				translate([0,-rx0-end_radius,0]) scale([neck_width/2, end_radius, target_neck_thickness*0.93]) sphere(r=1, $fn=360);
			}
			translate([-500, 0, scallop_depth]) cube([1000, 1000, 1000]);
			translate([-500, fret_width/2 - 1000, -500]) cube([1000, 1000, 1000]);
			translate([0, -fret_scale_length(0), 0]) {
				for (v = reinforcing_tube_positions) CFTubeCutout2(v, x0, x1);
				for (v = reinforcing_square_positions) CFSquareCutout2(v, x0, x1);
			}
			StringHoles();
			translate([-10,fret_width/2+1,-10]) rotate([90,0,0]) linear_extrude(10) {
				text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
			}
		}
		// StringHoles();
	}

	module TunerPlacement(cutout = false, ear_extra_diameter = 0, ear_extra_height = 0, plate_clearance = 0, shaft_clearance = 0, shaft_tolerance = 0) {
		for (m=[0,1]) mirror([m, 0, 0]) translate([29,3,-32]) rotate([0,-90,0]) NylonTuner(cutout, ear_extra_diameter, ear_extra_height, plate_clearance, shaft_clearance, shaft_tolerance);
	}

	module LoopOrTunerBlock(tuner_block) {
		y0 = 116;
		y1 = fret_scale_length(22);
		z0 = -43;
		z_drop = 6;
		loop_thick = 8;
		loop_slot_thick = 6;
		z1 = z0 + z_drop;
		module TunerBlockCheekVolumes() {
			vw = 50;
			for (i=[-1,1]) translate([-vw/2 + i*58, 0, z0]) cube([vw, y0, -z0]);
			for (i=[-1,1]) translate([-vw/2 + i*46, 0, -14]) cube([vw, y0, -z0]);
		}
		if (tuner_block) {
			render() difference() {
				translate([-body_width/2, 0, z0]) cube([body_width, y0, -z0]);
				// Tuner cutouts
				TunerPlacement(true, 4, 10, 10, 10, 0.4);
				tw = 16;
				for (i=[-1,1]) translate([-tw/2 + i*15, 0, z0]) cube([tw, y0, -z0-20]);
				// Cheek Volumes
				TunerBlockCheekVolumes();
				// CF
				for (v = reinforcing_tube_positions) CFTubeCutout2(v, y0, y1);
				for (v = reinforcing_square_positions) CFSquareCutout2(v, y0, y1);
				// Version stamp
				translate([0,0.5,-5]) rotate([90,0,0]) linear_extrude(10) {
					text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
				}
				translate([0,y0-0.5,-5]) rotate([90,0,180]) linear_extrude(10) {
					text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
				}
			}
		} else {
			render() difference() {
				hull() {
					translate([-neck_width/2, y1-hull_epsilon, z1]) cube([neck_width, hull_epsilon, -z1]);
					translate([-body_width/2, y0, z0]) cube([body_width, hull_epsilon, -z0]);
				}
				// Belt loop slot
				hull() {
					translate([0, y1-loop_slot_thick, z1+loop_thick]) rotate([0,90,0]) cylinder(d=loop_slot_thick, h=body_width, center=true, $fn=cyl_hd_fn);
					translate([0, y0+loop_slot_thick, z0+loop_thick]) rotate([0,90,0]) cylinder(d=loop_slot_thick, h=body_width, center=true, $fn=cyl_hd_fn);
				}
				// Angled belt loop slot
				hull() {
					extend_factor = 0.8;
					translate([body_width/2, y1-loop_slot_thick + (y1-y0-loop_slot_thick*2)*extend_factor, z1+loop_thick + (z1-z0)*extend_factor]) rotate([0,90,0]) cylinder(d=loop_slot_thick, h=hull_epsilon, $fn=cyl_hd_fn);
					translate([0, y0+loop_slot_thick, z0+loop_thick]) rotate([0,90,0]) cylinder(d=loop_slot_thick, h=body_width, center=true, $fn=cyl_hd_fn);
				}
				// Version stamp
				translate([-10,y0+0.5,-30]) rotate([90,0,0]) linear_extrude(10) {
					text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
				}
				translate([-10,y1-0.5,-30]) rotate([90,0,180]) linear_extrude(10) {
					text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
				}
				// CF
				for (v = reinforcing_tube_positions) CFTubeCutout2(v, y0, y1);
				for (v = reinforcing_square_positions) CFSquareCutout2(v, y0, y1);
			}
		}
	}
	bridge_channel_width = 5;
	bridge_channel_depth = 7;

	if (reference) {
		union() {
			c_cf = [0.4, 0.5, 0.5];
			%MyNeck();
			// CF square stacks
			for (v = reinforcing_tube_positions) color(c_cf) translate(v) CFTube();
			for (v = reinforcing_square_positions) color(c_cf) translate(v) CFSquare();
			// Approximate tuner placement
			TunerPlacement();
			// Render strings above for spacing reference
			string_excess = 80;
			for (i = [0:num_strings-1]) {
				translate([(num_strings-i-1)*string_spacing - neck_width/2 + string_margin,0,5]) rotate([-90,0,0]) translate([0,0,-string_excess/2]) cylinder(h=fsl_mm+string_excess, d=string_diameters_mm[i], $fn=cyl_ld_fn);
			}
		}
	} else if (from_fret >= 0) {
		RealPiece(from_fret, to_fret, include_from_fret = (from_fret==0));
	} else if (from_fret == -1) {
		// String holding headpiece
		echo("Making a headpiece");
		HeadPiece();
	} else if (from_fret == -2) {
		echo("Making a filler belt loop");
		LoopOrTunerBlock(false);
	} else if (from_fret == -3) {
		echo("Making a tuner block");
		LoopOrTunerBlock(true);
	} else if (from_fret == -4) {
		echo("Making a bridge");
		y_len = 9;
		base_height = 7;
		saddle_height = 4;
		pickup_w = 3;
		pickup_h = 2;
		render() difference() {
			union() {
				// Base
				translate([-neck_width/2, 0, 0]) cube([neck_width, y_len, base_height]);
				// String saddles - rule of thumb: string diameter multiplied by 4
				r0 = 0.85;
				for (i = [0:num_strings-1]) translate([(num_strings-i-1)*string_spacing - neck_width/2 + string_margin, y_len - string_diameters_mm[i]*4, base_height]) {
					step = ($preview) ? 8 : 2;
					r = r0 + string_diameters_mm[i]*1.2;
					translate([0, 0, saddle_height]) for (a=[90:step:270-step]) hull() {
						translate([-sin(a)*r,      0, cos(a)*r])      sphere(r=r0, $fn=cyl_ld_fn);
						translate([-sin(a+step)*r, 0, cos(a+step)*r]) sphere(r=r0, $fn=cyl_ld_fn);
						translate([-sin(a)*r,      -3.7, -saddle_height-r0]) sphere(r=r0, $fn=cyl_ld_fn);
						translate([-sin(a+step)*r, -3.7, -saddle_height-r0]) sphere(r=r0, $fn=cyl_ld_fn);
						translate([-sin(a)*r,       1.2, -saddle_height-r0]) sphere(r=r0, $fn=cyl_ld_fn);
						translate([-sin(a+step)*r,  1.2, -saddle_height-r0]) sphere(r=r0, $fn=cyl_ld_fn);
					}
				}
				// Bridge channel notch
				notch_w = bridge_channel_width - CF_Square_Width_tolerance;  // Shrink a little for tolerance
				notch_d = bridge_channel_depth - CF_Square_Width_tolerance/2;
				translate([-notch_w/2, 0, -notch_d]) cube([notch_w, y_len, notch_d]);
			}
			// Pickup notch
			tol = 0.25;
			translate([-neck_width/2, 2, -tol]) hull() {
				cube([neck_width, pickup_w, pickup_h+tol]);
				translate([0, pickup_h*0.8, 0]) cube([neck_width, pickup_w, 0.01]);
			}
			// Version stamp
			y0 = 0;
			y1 = y_len;
			translate([-15,y0+0.5,4]) rotate([90,0,0]) linear_extrude(10) {
				text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
			}
			translate([-15,y1-0.5,4]) rotate([90,0,180]) linear_extrude(10) {
				text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
			}
		}
	} else if (from_fret == -5) {
		echo("Making a tailpiece");
		y0 = -47;
		y1 = 0;
		fw_len = 20;
		total_len = y1-y0;
		fw_height = 43;
		rad_diameter = 20.35; //21;
		rad_radius = rad_diameter/2;
		render() difference() {
			hull() {
				translate([-body_width/2, -fw_len, -fw_height]) cube([body_width, fw_len, fw_height]);
				translate([0, -total_len+rad_radius, -rad_radius]) rotate([0,90,0]) cylinder(h=neck_width, d=rad_diameter, center=true, $fn=cyl_hd_fn);
			}
			// Tuner cavity line up
			tw = 16;
			z0 = -43;
			for (i=[-1,1]) translate([-tw/2 + i*15, y0, z0+5]) cube([tw, total_len, -z0-25]);
			// String channels
			for (i = [0:num_strings-1]) translate([(num_strings-i-1)*string_spacing - neck_width/2 + string_margin, y0+rad_radius, -rad_radius]) {
				x = [-1,0,1,-1,0,1][i]*4/180;
				r = rad_radius + string_diameters_mm[i]*0.5;
				for (a = [0:180]) hull() {
					translate([a*x, -sin(a)*r,   cos(a)*r]) sphere(r=string_diameters_mm[i], $fn=cyl_ld_fn);
					translate([a*x, -sin(a+1)*r, cos(a+1)*r]) sphere(r=string_diameters_mm[i], $fn=cyl_ld_fn);
				}
			}
			// Bridge channel
			translate([-bridge_channel_width/2, y0+rad_radius, -bridge_channel_depth]) cube([bridge_channel_width, total_len-rad_radius, bridge_channel_depth]);
			// Version stamp
			translate([-30,y0+0.5,-15]) rotate([90,0,0]) linear_extrude(10) {
				text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
			}
			translate([-30,y1-0.5,-15]) rotate([90,0,180]) linear_extrude(10) {
				text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
			}
			// CF
			for (v = reinforcing_tube_positions) CFTubeCutout2(v, y0, y1);
			for (v = reinforcing_square_positions) CFSquareCutout2(v, y0, y1);
		}
	}
	// Debug markers to aid part slicing eyeballing
	// %for (i = [150:250:1000]) {
	%for (i = [0:250:1000]) {
		translate([35,i,0]) union() {linear_extrude(1) text(str(i, "mm")); cube([35, 1, 1], center=true);}
	}
}



module Steel6String(include_colours, from_fret=0, to_fret=1, reference=false) {
	id_line_0 = "ABS";
	id_line_1 = "2";
	fsl_mm = fret_scale_length(0);

	string_diameters_thous = [9, 11, 16, 24, 32, 42];  // Artist ELST942
	string_diameters_mm = string_diameters_thous * 0.0254;

	num_frets = 22;
	num_strings = 6;
	// 56mm wide neck
	string_spacing_nut = 10;  // 50mm E to e
	string_spacing_bridge = 11.2;  // 56mm E to e
	function string_spacing(y) = lerp(string_spacing_bridge, string_spacing_nut, y/fret_scale_length(0));
	string_margin = 3;  // +6
	neck_width_nut = (num_strings-1)*string_spacing_nut + string_margin*2;
	neck_width_bridge = (num_strings-1)*string_spacing_bridge + string_margin*2;
	function neck_width_mm(y) = lerp(neck_width_bridge, neck_width_nut, y/fret_scale_length(0));
	body_width = 96;
	scallop_depth = 2.0;
	_zero_fret_width = 3.6;
	_fret_width = 2.4;
	fret_widths = flatten([[_zero_fret_width], [ for (i = [1:num_frets]) _fret_width ]]);
	function get_fret_width(fret) = fret_widths[clamp(0, fret, num_frets)];
	fret_angle = 60;
	max_fret_width = max(fret_widths);
	max_fret_height = sin(fret_angle) * max_fret_width/2;
	target_neck_thickness = 16;
	// echo(fret_scale_length(8));
	// echo(fret_scale_length(9));
	rx0 = -40;  // Reinforcing rods start
	rx1 = rx0+280;

	target_neck_thickness_additional_points = [];
	// target_neck_thickness_additional_points = [[rx0+CF_Tube_Len+20, 22], [0, 22]];

	echo(str("Making a Steel 6 String with scale length ", fsl_mm, "mm = ", fsl_mm/25.4, "in and neck width ", neck_width_nut, "mm"));
	assert(fsl_mm == Fender_Scale_mm);  // Make sure the function correctly uses our changed global

	function CF_Span_Coords(full_length = 700, ply = 3) = [for (i=[0:ply-1]) [0, lerp(0, full_length-CF_Tube_Len, i/(ply-1)), CF_Square_Width*i]];
	module CF_Span(full_length = 700, ply = 3, hole = true) {
		for (v = CF_Span_Coords(full_length, ply))
			translate(v) CFSquare(hole=hole);
	}
	module MyNeck(inlays_only=false, side_markers_only=false, fret_layers_only=false, engrave_markers=false, remove_fret_layers=false) {
		render() TaperNeck(
			num_frets = num_frets,
			fret_widths = fret_widths,
			fret_angle = fret_angle,
			num_strings = num_strings,
			string_margin = string_margin,
			string_spacing_nut = string_spacing_nut,
			string_spacing_bridge = string_spacing_bridge,
			scallop_depth = scallop_depth,
			target_neck_thickness = target_neck_thickness,
			target_neck_thickness_additional_points = target_neck_thickness_additional_points,
			include_colours = include_colours,
		);
	}

	module truss_rods() {
		include_from_fret = (from_fret==0);
		x0 = fret_scale_length(to_fret) - get_fret_width(to_fret)/2;
		//x1 = fret_scale_length(from_fret) + ((include_from_fret)?1:(-1)) * get_fret_width(from_fret)/2;
		x1 = include_from_fret ? (fret_scale_length(from_fret) - get_fret_width(from_fret)/2) : x0;  // hacky fix for included headpiece
		tolerance = reference ? 0 : 0.4;
		rod_mm = 630;
		v = [0, 40, -9];
		// Nut facing bridge
		// o = v[1];
		// taper_points = reference ? [] : [x0-o, x1-o];
		// translate(v) TrussRod(taper_points = taper_points, tolerance = tolerance, extra = !reference);
		// Nut facing headstock
		o = v[1];
		taper_points = reference ? [] : [rod_mm-(x0-o), rod_mm-(x1-o)];
		translate(v + [0, rod_mm, 0]) rotate([0, 0, 180]) TrussRod(taper_points = taper_points, tolerance = tolerance, extra = !reference);
	}

	reinforcing_tube_positions = flatten([
		[
			for (i=[-1,1]) each [
				// Headside reinforcement
				[i*20.5, rx1, -4],
				// Bridgeside reinforcement
				[i*20.5, rx0, -4],
				// [i*17.25, rx0, -10],
				// [i*17, rx0, -12],
				// [i*3.95, rx0, -16.5],
			]
		],
		[
			// Headside reinforcement
			// [0, rx1, -4],
			// [0, rx1, -11],
			// Bridgeside reinforcement
			// [0, rx0, -11],
		]]);
	echo(reinforcing_tube_positions);
	// Through span construction
	rx2 = fret_scale_length(15) - CF_Tube_Len;
	reinforcing_square_positions = flatten([
		[
			for (i=[-1,1]) each [
				// Headside reinforcement
				// [i*20.5, rx1, -4],
				// Bridgeside reinforcement
				[i*12, rx2, -6],
				// [i*17.25, rx2, -10],
				// [i*17, rx0, -12],
				// [i*3.95, rx0, -16.5],
			]
		],
		[
			// Headside reinforcement
			// [0, rx1, -4],
			// [0, rx1, -11],
			// Bridgeside reinforcement
			// [0, rx0, -11],
		]]);
	echo(reinforcing_square_positions);


	// neck(num_frets=num_frets, num_strings=num_strings, string_margin=string_margin, string_spacing=string_spacing);
	// %neck(num_frets=num_frets, num_strings=num_strings, string_margin=string_margin, string_spacing=string_spacing, scallop_depth=scallop_depth, target_neck_thickness=target_neck_thickness);
	module NeckFragment(from_fret, to_fret, to_origin=true, include_from_fret=false) {
		x0 = fret_scale_length(to_fret) - get_fret_width(to_fret)/2;
		x1 = fret_scale_length(from_fret) + ((include_from_fret)?1:(-1)) * get_fret_width(from_fret)/2;
		xn = fsl_mm + fret_widths[0];

		//translate([0,to_origin ? -x0 : 0,0])
		render() difference() {
			MyNeck();
			translate([-100, 0, -100]) cube([200, x0, 200]);
			translate([-100, x1, -100]) cube([200, xn-x1, 200]);
			for (v = reinforcing_tube_positions) CFTubeCutout2(v, x0, x1);
			for (v = reinforcing_square_positions) CFSquareCutout2(v, x0, x1);
			truss_rods();
		}
	}

	module RealPiece(from_fret, to_fret, include_from_fret=false) {
		// midpoint = (fret_scale_length(from_fret) - fret_scale_length(to_fret) + (include_from_fret ? fret_width : 0))/2;
		module IDText(thickness = 0.2, inset = 0, extra_line=str("F", to_fret)) {
			translate([0,0,-8]) rotate([-90,180,180]) translate([0,0,-thickness-inset]) linear_extrude(thickness) {
				text(str(id_line_0, id_line_1), size=2.25, halign="center", valign="center", $fn=100);
				translate([0,-3]) text(extra_line, size=2.25, halign="center", valign="center", $fn=100);
			}
		}
		// module BackIDText(thickness = 0.2, inset = 0) {
		// 	rotate_around([0,0,180], [0,midpoint,0])
		// 		IDText(thickness, inset, str("F", from_fret));
		// }
		render() difference(){
			NeckFragment(from_fret, to_fret, include_from_fret=include_from_fret);
			// Subtract from frets
			color("red") {
				IDText();
				// if (include_from_fret) BackIDText();
			}
			// color("red") BackIDText();
		}
	}

	function string_x(i, y) = (num_strings-i-1)*string_spacing(y) - neck_width_mm(y)/2 + string_margin;

	module HeadPiece(label=true) {
		string_offsets = [-2.5, 0, 2.5, -2.5, 0, 2.5];
		x0 = fret_scale_length(0) + fret_widths[0]/2;
		end_radius = 12;
		x1 = x0 - rx0 + end_radius;
		z1 = scallop_depth + max_fret_height;
		module StringHoles() {
			for (i = [0:num_strings-1]) translate([string_x(i, x0),0,0]) {
				// translate([0,0,z1+string_diameters_mm[i]]) rotate([-105,0,0]) cylinder(h=30, d=string_diameters_mm[i]*2, $fn=cyl_ld_fn);
				hull() {
					translate([0,0,z1+string_diameters_mm[i]]) sphere(d=min(2.6, string_diameters_mm[i]*1.2 + 1), $fn=360);
					translate([string_offsets[i],27,-3.5]) sphere(d=2.6, $fn=360);
				}
				hull() {
					// String ball ends are roughly 3mm by 4mm cylinder(d=4, h=3)
					// translate([string_offsets[i],29,-3.5]) sphere(d=5.5, $fn=360);
					// translate([string_offsets[i],29+11,-17]) sphere(d=7, $fn=360);
					translate([string_offsets[i],27,-3.5]) rotate([0, 90, 0]) cylinder(d=4.5, h=3.5, center=true, $fn=360);
					translate([string_offsets[i],27+27,-17]) rotate([0, 90, 0]) cylinder(d=6.5, h=5.0, center=true, $fn=360);
				}
			}
		}
		fw2 = fret_widths[0]/2;
		render() difference(){
			hull() {
				translate([0,fw2,0]) scale([neck_width_mm(x0)/2, 0.01, target_neck_thickness]) sphere(r=1, $fn=360);
				translate([0,-rx0-end_radius,0]) scale([neck_width_mm(x1)/2, end_radius, target_neck_thickness*1.0]) sphere(r=1, $fn=360);
			}
			translate([-500, 0, scallop_depth]) cube([1000, 1000, 1000]);
			translate([-500, fw2 - 1000, -500]) cube([1000, 1000, 1000]);
			translate([0, -fret_scale_length(0), 0]) {
				for (v = reinforcing_tube_positions) CFTubeCutout2(v, x0, x1);
				for (v = reinforcing_square_positions) CFSquareCutout2(v, x0, x1);
			}
			StringHoles();
			if (label) translate([-10,fw2+1,-10]) rotate([90,0,0]) linear_extrude(10) {
				text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
			}
		}
		// StringHoles();
	}

	module TunerPlacement(cutout = false, ear_extra_diameter = 0, ear_extra_height = 0, plate_clearance = 0, shaft_clearance = 0, shaft_tolerance = 0) {
		for (m=[0,1]) mirror([m, 0, 0]) translate([29,3,-32]) rotate([0,-90,0]) NylonTuner(cutout, ear_extra_diameter, ear_extra_height, plate_clearance, shaft_clearance, shaft_tolerance);
	}

	module LoopOrTunerBlock(tuner_block) {
		y0 = 116;
		y1 = fret_scale_length(22);
		z0 = -43;
		z_drop = 6;
		loop_thick = 8;
		loop_slot_thick = 6;
		z1 = z0 + z_drop;
		module TunerBlockCheekVolumes() {
			vw = 50;
			for (i=[-1,1]) translate([-vw/2 + i*58, 0, z0]) cube([vw, y0, -z0]);
			for (i=[-1,1]) translate([-vw/2 + i*46, 0, -14]) cube([vw, y0, -z0]);
		}
		if (tuner_block) {
			render() difference() {
				translate([-body_width/2, 0, z0]) cube([body_width, y0, -z0]);
				// Tuner cutouts
				TunerPlacement(true, 4, 10, 10, 10, 0.4);
				tw = 16;
				for (i=[-1,1]) translate([-tw/2 + i*15, 0, z0]) cube([tw, y0, -z0-20]);
				// Cheek Volumes
				TunerBlockCheekVolumes();
				// CF
				for (v = reinforcing_tube_positions) CFTubeCutout2(v, y0, y1);
				for (v = reinforcing_square_positions) CFSquareCutout2(v, y0, y1);
				// Version stamp
				translate([0,0.5,-5]) rotate([90,0,0]) linear_extrude(10) {
					text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
				}
				translate([0,y0-0.5,-5]) rotate([90,0,180]) linear_extrude(10) {
					text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
				}
			}
		} else {
			render() difference() {
				hull() {
					translate([-neck_width/2, y1-hull_epsilon, z1]) cube([neck_width, hull_epsilon, -z1]);
					translate([-body_width/2, y0, z0]) cube([body_width, hull_epsilon, -z0]);
				}
				// Belt loop slot
				hull() {
					translate([0, y1-loop_slot_thick, z1+loop_thick]) rotate([0,90,0]) cylinder(d=loop_slot_thick, h=body_width, center=true, $fn=cyl_hd_fn);
					translate([0, y0+loop_slot_thick, z0+loop_thick]) rotate([0,90,0]) cylinder(d=loop_slot_thick, h=body_width, center=true, $fn=cyl_hd_fn);
				}
				// Angled belt loop slot
				hull() {
					extend_factor = 0.8;
					translate([body_width/2, y1-loop_slot_thick + (y1-y0-loop_slot_thick*2)*extend_factor, z1+loop_thick + (z1-z0)*extend_factor]) rotate([0,90,0]) cylinder(d=loop_slot_thick, h=hull_epsilon, $fn=cyl_hd_fn);
					translate([0, y0+loop_slot_thick, z0+loop_thick]) rotate([0,90,0]) cylinder(d=loop_slot_thick, h=body_width, center=true, $fn=cyl_hd_fn);
				}
				// Version stamp
				translate([-10,y0+0.5,-30]) rotate([90,0,0]) linear_extrude(10) {
					text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
				}
				translate([-10,y1-0.5,-30]) rotate([90,0,180]) linear_extrude(10) {
					text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
				}
				// CF
				for (v = reinforcing_tube_positions) CFTubeCutout2(v, y0, y1);
				for (v = reinforcing_square_positions) CFSquareCutout2(v, y0, y1);
			}
		}
	}
	bridge_channel_width = 5;
	bridge_channel_depth = 7;

	if (reference) {
		/*translate([0, -fsl_mm, 0]) */union() {
			c_cf = [0.4, 0.5, 0.5];
			%MyNeck();
			// CF square stacks
			truss_rods();
			for (v = reinforcing_tube_positions) color(c_cf) translate(v) CFTube();
			for (v = reinforcing_square_positions) color(c_cf) translate(v) CFSquare();
			// Approximate tuner placement
			// TunerPlacement();
			// Render strings above for spacing reference
			string_excess = 80;
			for (i = [0:num_strings-1]) {
				hull() {
					translate([string_x(i, -string_excess), -string_excess, 5]) sphere(d=string_diameters_mm[i], $fn=cyl_ld_fn);
					translate([string_x(i, fsl_mm+5), fsl_mm+5, 5]) sphere(d=string_diameters_mm[i], $fn=cyl_ld_fn);
				}
			}
		}
		%HeadPiece(false);
	} else if (from_fret >= 0) {
		RealPiece(from_fret, to_fret, include_from_fret = (from_fret==0));
		if ((from_fret == 0) && list_has(include_colours, 0)) {
			echo("Making a headpiece");
			render() difference() {
				translate([0, fret_scale_length(0), 0]) HeadPiece(false);
				truss_rods();
			}
		}
	} else if (from_fret == -1) {
		// String holding headpiece
		echo("Making a headpiece");
		HeadPiece();
	} else if (from_fret == -2) {
		echo("Making a filler belt loop");
		LoopOrTunerBlock(false);
	} else if (from_fret == -3) {
		echo("Making a tuner block");
		LoopOrTunerBlock(true);
	} else if (from_fret == -4) {
		echo("Making a bridge");
		y_len = 9;
		base_height = 7;
		saddle_height = 4;
		pickup_w = 3;
		pickup_h = 2;
		render() difference() {
			union() {
				// Base
				translate([-neck_width/2, 0, 0]) cube([neck_width, y_len, base_height]);
				// String saddles - rule of thumb: string diameter multiplied by 4
				r0 = 0.85;
				for (i = [0:num_strings-1]) translate([(num_strings-i-1)*string_spacing - neck_width/2 + string_margin, y_len - string_diameters_mm[i]*4, base_height]) {
					step = ($preview) ? 8 : 2;
					r = r0 + string_diameters_mm[i]*1.2;
					translate([0, 0, saddle_height]) for (a=[90:step:270-step]) hull() {
						translate([-sin(a)*r,      0, cos(a)*r])      sphere(r=r0, $fn=cyl_ld_fn);
						translate([-sin(a+step)*r, 0, cos(a+step)*r]) sphere(r=r0, $fn=cyl_ld_fn);
						translate([-sin(a)*r,      -3.7, -saddle_height-r0]) sphere(r=r0, $fn=cyl_ld_fn);
						translate([-sin(a+step)*r, -3.7, -saddle_height-r0]) sphere(r=r0, $fn=cyl_ld_fn);
						translate([-sin(a)*r,       1.2, -saddle_height-r0]) sphere(r=r0, $fn=cyl_ld_fn);
						translate([-sin(a+step)*r,  1.2, -saddle_height-r0]) sphere(r=r0, $fn=cyl_ld_fn);
					}
				}
				// Bridge channel notch
				notch_w = bridge_channel_width - CF_Square_Width_tolerance;  // Shrink a little for tolerance
				notch_d = bridge_channel_depth - CF_Square_Width_tolerance/2;
				translate([-notch_w/2, 0, -notch_d]) cube([notch_w, y_len, notch_d]);
			}
			// Pickup notch
			tol = 0.25;
			translate([-neck_width/2, 2, -tol]) hull() {
				cube([neck_width, pickup_w, pickup_h+tol]);
				translate([0, pickup_h*0.8, 0]) cube([neck_width, pickup_w, 0.01]);
			}
			// Version stamp
			y0 = 0;
			y1 = y_len;
			translate([-15,y0+0.5,4]) rotate([90,0,0]) linear_extrude(10) {
				text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
			}
			translate([-15,y1-0.5,4]) rotate([90,0,180]) linear_extrude(10) {
				text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
			}
		}
	} else if (from_fret == -5) {
		echo("Making a tailpiece");
		y0 = -47;
		y1 = 0;
		fw_len = 20;
		total_len = y1-y0;
		fw_height = 43;
		rad_diameter = 20.35; //21;
		rad_radius = rad_diameter/2;
		render() difference() {
			hull() {
				translate([-body_width/2, -fw_len, -fw_height]) cube([body_width, fw_len, fw_height]);
				translate([0, -total_len+rad_radius, -rad_radius]) rotate([0,90,0]) cylinder(h=neck_width, d=rad_diameter, center=true, $fn=cyl_hd_fn);
			}
			// Tuner cavity line up
			tw = 16;
			z0 = -43;
			for (i=[-1,1]) translate([-tw/2 + i*15, y0, z0+5]) cube([tw, total_len, -z0-25]);
			// String channels
			for (i = [0:num_strings-1]) translate([(num_strings-i-1)*string_spacing - neck_width/2 + string_margin, y0+rad_radius, -rad_radius]) {
				x = [-1,0,1,-1,0,1][i]*4/180;
				r = rad_radius + string_diameters_mm[i]*0.5;
				for (a = [0:180]) hull() {
					translate([a*x, -sin(a)*r,   cos(a)*r]) sphere(r=string_diameters_mm[i], $fn=cyl_ld_fn);
					translate([a*x, -sin(a+1)*r, cos(a+1)*r]) sphere(r=string_diameters_mm[i], $fn=cyl_ld_fn);
				}
			}
			// Bridge channel
			translate([-bridge_channel_width/2, y0+rad_radius, -bridge_channel_depth]) cube([bridge_channel_width, total_len-rad_radius, bridge_channel_depth]);
			// Version stamp
			translate([-30,y0+0.5,-15]) rotate([90,0,0]) linear_extrude(10) {
				text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
			}
			translate([-30,y1-0.5,-15]) rotate([90,0,180]) linear_extrude(10) {
				text(str(id_line_0, id_line_1), size=2.9, halign="center", valign="center", $fn=100);
			}
			// CF
			for (v = reinforcing_tube_positions) CFTubeCutout2(v, y0, y1);
			for (v = reinforcing_square_positions) CFSquareCutout2(v, y0, y1);
		}
	}
	// Debug markers to aid part slicing eyeballing
	// %for (i = [150:250:1000]) {
	%for (i = [0:250:1000]) {
		translate([35,i,0]) union() {linear_extrude(1) text(str(i, "mm")); cube([35, 1, 1], center=true);}
	}
}

// echo(fret_scale_length(0) - fret_scale_length(8));  // 225.724
// echo(fret_scale_length(8) - fret_scale_length(24));  // 240.335
// fret_tube(0, 8);
// //translate([30, 0, 0])
// fret_tube(8, 24);

// headpiece();
// UBassTuner();

// fret_tube_filler(24, 100);
// tailpiece();
// bridge();

// Guitar_Scale_Length_mm = Classical_Short_Scale_mm;
// Nylon6String(reference=true);
// translate([0, fret_scale_length(22), 0]) Nylon6String(from_fret=0, to_fret=22);
// translate([0, Guitar_Scale_Length_mm, 0]) rotate([0,0,180]) Nylon6String(reference=true);
// rotate([0,0,180]) Nylon6String(from_fret=-1);
// Nylon6String(from_fret=-2);
// Nylon6String(from_fret=-3);
// Nylon6String(from_fret=-4);
// %Nylon6String(from_fret=-5);

// difference() {
// 	translate([-15, -60, 0]) cube([50, 120, 8]);
// 	translate([0, 55, 3]) rotate([180,0,0]) NylonTuner();
// }



// Colour schemes
include <BambuColours.scad>
COLOURSCHEME_ABS_CLOWNFISH = [BAMBU_ABS_ORANGE, BAMBU_ABS_WHITE, BAMBU_ABS_BLACK, BAMBU_ABS_BLACK];
COLOURSCHEME_ABSGF_CLOWNFISH = [BAMBU_ABSGF_ORANGE, BAMBU_ABSGF_WHITE, BAMBU_ABSGF_BLACK, BAMBU_ABSGF_BLACK];
COLOURSCHEME_PA6GF_CLOWNFISH = [BAMBU_PA6GF_ORANGE, BAMBU_PA6GF_WHITE, BAMBU_PA6GF_BLACK, BAMBU_PA6GF_BLACK];
COLOURSCHEME_PETGHF_CLOWNFISH = [BAMBU_PETGHF_ORANGE, BAMBU_PETGHF_WHITE, BAMBU_PETGHF_BLACK, BAMBU_PETGHF_BLACK];

COLOURSCHEME_ABS_BLUE = [BAMBU_ABS_NAVY_BLUE, BAMBU_ABS_AZURE, BAMBU_ABS_AZURE, BAMBU_ABS_AZURE];
COLOURSCHEME_PETGHF_BLUE = [BAMBU_PETGHF_LAKE_BLUE, BAMBU_PETGHF_LAKE_BLUE, "", ""];

colour_scheme = COLOURSCHEME_ABSGF_CLOWNFISH;
// colour_scheme = COLOURSCHEME_ABS_BLUE;
color(colour_scheme[0]) rotate([90,0,0]) Steel6String(from_fret=15, to_fret=23, include_colours=[0]);
color(colour_scheme[1]) rotate([90,0,0]) Steel6String(from_fret=15, to_fret=23, include_colours=[1]);
color(colour_scheme[2]) rotate([90,0,0]) Steel6String(from_fret=15, to_fret=23, include_colours=[2]);
color(colour_scheme[3]) rotate([90,0,0]) Steel6String(from_fret=15, to_fret=23, include_colours=[3]);
// rotate([90,0,0]) Steel6String(include_colours=[0,1,2,3], reference=true);

// TrussRod();
// difference() {
// 	l = 70;
// 	w = 20;
// 	extra = 5;
// 	translate([-w/2, -extra, 1.6-w/2]) cube([w, l+extra, w]);
// 	TrussRod(taper_points=[-extra, l], extra=true, tolerance = 0.24);
// }