split in half, added flange

spoolholder.scad

@@ -1,22 +1,7 @@
-od=55;
+od=75;
 id=9.5;
 len=80;
 
-linear_extrude(len)
-{
-	difference()
-	{
-		circle(d=od, $fn=90);
-		circle(d=od-4, $fn=90);
-	}
-
-	difference()
-	{
-		circle(d=id+4, $fn=90);
-		circle(d=id, $fn=90);
-	}
-}
-
 module truss()
 {
 	polygon([[od/2-3,0],
@@ -32,23 +17,78 @@ module truss()
 	]);
 }
 
-translate([0,1.5,0])
-rotate([90,0,0])
-linear_extrude(3)
-	truss();
+module end_spoke()
+{
+	linear_extrude(3)
+	polygon([[-1.5,id/2],
+			 [1.5,id/2],
+			 [1.5,od/2],
+			 [-1.5,od/2]]);
+}
 
-translate([-1.5,0,0])
-rotate([90,0,90])
-linear_extrude(3)
-	truss();	
+difference()
+{
+	union() // main body
+	{
+		linear_extrude(len)
+		{
+			difference()
+			{
+				circle(d=od, $fn=90);
+				circle(d=od-4, $fn=90);
+			}
+
+			difference()
+			{
+				circle(d=id+4, $fn=90);
+				circle(d=id, $fn=90);
+			}
+		}
+
+		// diagonal spokes
+		translate([0,1.5,0])
+		rotate([90,0,0])
+		linear_extrude(3)
+			truss();
+
+		translate([-1.5,0,0])
+		rotate([90,0,90])
+		linear_extrude(3)
+			truss();	
+			
+		translate([0,-1.5,0])
+		rotate([90,0,180])
+		linear_extrude(3)
+			truss();	
+			
+		translate([1.5,0,0])
+		rotate([90,0,-90])
+		linear_extrude(3)
+			truss();	
+	}
 	
-translate([0,-1.5,0])
-rotate([90,0,180])
-linear_extrude(3)
-	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);
+}
+
+// flange
+linear_extrude(2)
+difference()
+{
+	circle(d=od+20, $fn=90);
+	circle(d=od, $fn=90);
+}
+
+// spokes to support the flange
+end_spoke();
+
+rotate([0,0,90])
+	end_spoke();
 	
-translate([1.5,0,0])
-rotate([90,0,-90])
-linear_extrude(3)
-	truss();	
+rotate([0,0,180])
+	end_spoke();
 	
+rotate([0,0,-90])
+	end_spoke();