diff --git a/CFTubes.scad b/CFTubes.scad
index 92531cf..b4db99c 100644
--- a/CFTubes.scad
+++ b/CFTubes.scad
@@ -17,7 +17,7 @@ include <CFTubes/PETG.scad>
 // 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"]];
 
-module neck(string_spacing=18, string_margin=4.5, num_strings=3, target_neck_thickness=15, scallop_depth=3, num_frets=24, fret_width=2.4, filler=false) {
+module neck(string_spacing=18, string_margin=4.5, num_strings=3, target_neck_thickness=15, target_neck_thickness_additional_points=[], scallop_depth=3, num_frets=24, fret_width=2.4, filler=false) {
 	fw2 = fret_width/2;
 	neck_length = fret_scale_length(0)+fw2;
 	neck_width = (num_strings-1)*string_spacing + string_margin*2;
@@ -26,8 +26,24 @@ module neck(string_spacing=18, string_margin=4.5, num_strings=3, target_neck_thi
 		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)]]);  // Ellipse
+			if (len(target_neck_thickness_additional_points) < 1) {
+				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)]]);  // Ellipse
+			} else {
+				pts = flatten([[[neck_length, target_neck_thickness]], target_neck_thickness_additional_points]);
+				echo(pts);
+				for (i = [0:len(pts)-2]) {
+					pt0 = pts[i];
+					pt1 = pts[i+1];
+					echo(i, pt0, pt1);
+					render() hull() {
+						translate([0,0,pt0[0]]) linear_extrude(0.01)
+							polygon([for (i = [0:300]) let(a=lerp(a0, a1, i/300.0)) [neck_width*0.5*sin(a), -pt0[1]*cos(a)]]);  // Ellipse
+						translate([0,0,pt1[0]]) linear_extrude(0.01)
+							polygon([for (i = [0:300]) let(a=lerp(a0, a1, i/300.0)) [neck_width*0.5*sin(a), -pt1[1]*cos(a)]]);  // Ellipse
+					}
+				}
+			}
 	}
 	module scallop(fret) {
 			x0 = fret_scale_length(fret-1) - fw2;
@@ -354,8 +370,14 @@ module Nylon6String() {
 	string_margin = 3;  // +6
 	neck_width = string_spacing*(num_strings-1) + string_margin*2;
 	scallop_depth = 2.5;
-	target_neck_thickness = 22;
 	fret_width=2.4;
+	target_neck_thickness = 22;
+	echo(fret_scale_length(8));
+	echo(fret_scale_length(9));
+	// target_neck_thickness_additional_points = [[480, 22], [440, 30], [0, 30]];
+	// 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
@@ -365,6 +387,9 @@ module Nylon6String() {
 		for (v = CF_Span_Coords(full_length, ply))
 			translate(v) CFSquare(hole=hole);
 	}
+	module MyNeck() {
+		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);
+	}
 
 	reinforcing_tube_positions = flatten([
 		[
@@ -407,7 +432,7 @@ module Nylon6String() {
 		}
 
 		translate([0,to_origin ? -x0 : 0,0]) render() difference() {
-			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);
+			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);
@@ -434,12 +459,13 @@ module Nylon6String() {
 				translate([0,0,-9]) rotate([-90,180,180]) linear_extrude(3, center=true) text("PETG1α", size=2.5, halign="center", valign="center");
 		}
 	}
-	RealPiece(0, 8, include_from_fret=true);
+	// RealPiece(0, 8, include_from_fret=true);
+	RealPiece(8, 21);
 	%translate([100, 0, 0]) RealPiece(8, 21);
 
 	%translate([-100,0,0]) union() {
 		c_cf = [0.4, 0.5, 0.5];
-		%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);
+		%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();