fix spoolholder design to render properly

spoolholder.scad

@@ -2,15 +2,17 @@ od=75;
 id=9.5;
 len=80;
 
+// cut in half...uncomment middle block for full length
+
 module truss()
 {
 	polygon([[od/2-3,0],
 			 [id/2,len/4],
 			 [od/2-3,len/2],
-			 [id/2,3*len/4],
-			 [od/2-3,len],
-			 [od/2,len],
-			 [id/2+3,3*len/4],
+//			 [id/2,3*len/4],
+//			 [od/2-3,len],
+//			 [od/2,len],
+//			 [id/2+3,3*len/4],
 			 [od/2,len/2],
 			 [id/2+3,len/4],
 			 [od/2,0]
@@ -19,18 +21,18 @@ module truss()
 
 module end_spoke()
 {
-	linear_extrude(3)
+	linear_extrude(3, convexity=10)
 	polygon([[-1.5,id/2],
 			 [1.5,id/2],
 			 [1.5,od/2],
 			 [-1.5,od/2]]);
 }
 
-difference()
-{
+//difference()
+//{
 	union() // main body
 	{
-		linear_extrude(len)
+		linear_extrude(len/2, convexity=10)
 		{
 			difference()
 			{
@@ -48,33 +50,33 @@ difference()
 		// diagonal spokes
 		translate([0,1.5,0])
 		rotate([90,0,0])
-		linear_extrude(3)
+		linear_extrude(3, convexity=10)
 			truss();
 
 		translate([-1.5,0,0])
 		rotate([90,0,90])
-		linear_extrude(3)
+		linear_extrude(3, convexity=10)
 			truss();	
 			
 		translate([0,-1.5,0])
 		rotate([90,0,180])
-		linear_extrude(3)
+		linear_extrude(3, convexity=10)
 			truss();	
 			
 		translate([1.5,0,0])
 		rotate([90,0,-90])
-		linear_extrude(3)
+		linear_extrude(3, convexity=10)
 			truss();	
 	}
 	
-	// quick hack: cut in half so we can add flange
-	translate([0,0,len/2])
-	linear_extrude(len/2+1)
-		circle(d=od+1, $fn=90);
-}
+//	// quick hack: cut in half so we can add flange
+//	translate([0,0,len/2])
+//	linear_extrude(len/2+1)
+//		circle(d=od+1, $fn=90);
+//}
 
 // flange
-linear_extrude(2)
+linear_extrude(2, convexity=10)
 difference()
 {
 	circle(d=od+20, $fn=90);