diff --git a/involute_gears.scad b/involute_gears.scad
index 12e9a88..c626d1b 100644
--- a/involute_gears.scad
+++ b/involute_gears.scad
@@ -117,8 +117,8 @@ module gear2d(
 	bevelang        = 0.0
 ) {
 	r = root_radius(mm_per_tooth, number_of_teeth, clearance);
+	ang = 360/number_of_teeth/2;
 	union() {
-		circle(r=r-0.5, $fn=number_of_teeth);
 		for (i = [0:number_of_teeth-teeth_to_hide-1] ) {
 			rotate(i*360/number_of_teeth) {
 				translate([0,r,0]) {
@@ -131,6 +131,11 @@ module gear2d(
 						bevelang        = bevelang
 					);
 				}
+				polygon([
+					[-r*sin(ang), r*cos(ang)],
+					[0,0],
+					[r*sin(ang), r*cos(ang)]
+				]);
 			}
 		}
 	}
@@ -294,7 +299,7 @@ translate([ 0,    0, 0]) rotate([0,0, $t*360/n1])                 color([1.00,0.
 translate([ 0,  d12, 0]) rotate([0,0,-($t+n2/2-0*n1+1/2)*360/n2]) color([0.75,1.00,0.75]) gear(mm_per_tooth,n2,thickness,hole);
 translate([ d13,  0, 0]) rotate([0,0,-($t-n3/4+n1/4+1/2)*360/n3]) color([0.75,0.75,1.00]) gear(mm_per_tooth,n3,thickness,hole);
 translate([ d13,  0, 0]) rotate([0,0,-($t-n3/4+n1/4+1/2)*360/n3]) color([0.75,0.75,1.00]) gear(mm_per_tooth,n3,thickness,hole);
-translate([-d14,  0, 0]) rotate([0,0,-($t-n4/4-n1/4+1/2-floor(n4/4)-3)*360/n4]) color([1.00,0.75,0.50]) gear(mm_per_tooth,n4,thickness,hole);
+translate([-d14,  0, 0]) rotate([0,0,-($t-n4/4-n1/4+1/2-floor(n4/4)-3)*360/n4]) color([1.00,0.75,0.50]) gear(mm_per_tooth,n4,thickness,hole,teeth_to_hide=n4-3);
 translate([(-floor(n5/2)-floor(n1/2)+$t+n1/2-1/2)*9, -d1+0.0, 0]) rotate([0,0,0]) color([0.75,0.75,0.75]) rack(mm_per_tooth,n5,thickness,height);
 */