diff --git a/T-riple.scad b/T-riple.scad
index 7003de4..8f64ae1 100644
--- a/T-riple.scad
+++ b/T-riple.scad
@@ -2,12 +2,10 @@ include <common.scad>
 include <AluTCommon.scad>
 
 semitone_strings = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "X", "XI"];
-octave_strings = ["", "˙", "¨", "¯"];
+octave_strings = ["", ".", "..", "_"];
 octave_scales = [1.1, 1, 0.9, 0.8];
 
 z_resolution = $preview ? 0.5 : 0.1;
-$fs = $preview ? 1 : 0.01;
-$fa = $preview ? 5 : 0.1;
 profile_arc_steps_backside = $preview ? 8 : 360;
 profile_arc_steps_topside = $preview ? 8 : 60;
 
@@ -93,15 +91,25 @@ module tube(from_fret, to_fret, scale_offset = 0, fingerboard_min_thick = 2.5, f
 					o = fret_width/2 * sin(fret_angle),
 					x0 = f_prev - o,
 					x1 = f_next + o,
+					x_mid = (x0+x1)/2,
 					y0 = fingerboard_min_thick,
 					y1 = fingerboard_max_thick - (fret_width/2 * cos(fret_angle)),
-					pts = [[x0, y1], [x1, y1], [(x0+x1)/2, y0]],
+					pts = [[x0, y1], [x1, y1], [x_mid, y0]],
 					cc = tri_circumcenter(pts),
-					r = norm([x0, y1] - cc)
+					r = norm([x0, y1] - cc),
+					r2 = r^2,
+					a_start = acos((x0 - cc[0])/r),
+					a_end = acos((x1 - cc[0])/r),
+					a_sweep = a_end - a_start,
+					a_step = a_sweep/10
 				) {
-					translate([0,-w/2,0]) 
-					rotate([-90,-90,0])
-					translate(cc) cylinder(h = w, r = r, $fn=max(8*ceil(r), 32));
+					// echo(a_start=a_start, x0=x0, cc=cc);
+					translate([cc[1], 0, cc[0]])
+					rotate([90,0,0])
+					// cylinder(h = w, r = r, center = true);
+					linear_extrude(height = w, center = true)
+					// polygon([for (i = [0:10]) [-r*sin(a_start+i*a_step), r*cos(a_start+i*a_step)]]);
+					polygon([for (x = [x1-x_mid:0.05:x0-x_mid]) [-sqrt(r2 - x^2), x]]);
 				}
 		}
 
@@ -129,26 +137,28 @@ module tube(from_fret, to_fret, scale_offset = 0, fingerboard_min_thick = 2.5, f
 		// color("red") scallops();
 	}
 
+	module fret_number_text(fret) {
+		octave = floor(fret/12);
+		semitone = fret%12;
+		octave_scale = octave_scales[octave];
+		text(semitone_strings[semitone], size=4*octave_scale, halign="center", valign="center", font="Noto Sans", $fa=1, $fs=0.1);
+		translate([0, 2.5])
+			text(octave_strings[octave], size=5*octave_scale, halign="center", valign="center", font="Noto Sans", $fa=1, $fs=0.1);
+	}
+
 	module fret_number_markers(engrave_depth=1) {
 		color("purple")
 		// for (fret = [from_fret:to_fret])
 		for (fret = [from_fret+1:to_fret]) {
 			zn = fsl(fret);
 			pr = get_desired_profile_radius(get_desired_width_scale(zn));
-			octave = floor(fret/12);
-			semitone = fret%12;
-			octave_scale = octave_scales[octave];
-			// translate([-3,-16,zn-z_offset]) rotate([90,25,16]) linear_extrude(100) {
-			// translate([-3,-16,zn-z_offset]) rotate([90,25,-16+16*(zn/z0)]) linear_extrude(100) {
 			p_x0 = pr+x_min;
-			translate([p_x0, 0, zn-z_offset]) rotate([90,25,-asin((p_x0+2)/pr)]) translate([0, 0, pr-engrave_depth]) linear_extrude(engrave_depth+1) {
-				text(semitone_strings[semitone], size=4*octave_scale, halign="center", valign="center", font="Noto Sans");
-				text(octave_strings[octave], size=6*octave_scale, halign="center", valign="center", font="Noto Sans");
-			}
-			translate([p_x0, 0, zn-z_offset]) rotate([90,-25,180+asin((p_x0+2)/pr)]) translate([0, 0, pr-engrave_depth]) linear_extrude(engrave_depth+1) {
-				text(semitone_strings[semitone], size=4*octave_scale, halign="center", valign="center", font="Noto Sans");
-				text(octave_strings[octave], size=6*octave_scale, halign="center", valign="center", font="Noto Sans");
-			}
+			translate([p_x0, 0, zn-z_offset]) rotate([90,25,-asin((p_x0+2)/pr)])
+				translate([0, 0, pr-engrave_depth]) linear_extrude(engrave_depth+1)
+					fret_number_text(fret);
+			translate([p_x0, 0, zn-z_offset]) rotate([90,-25,180+asin((p_x0+2)/pr)])
+				translate([0, 0, pr-engrave_depth]) linear_extrude(engrave_depth+1)
+					fret_number_text(fret);
 		}
 	}