more designs

rod_cap.scad

@@ -0,0 +1,11 @@
+thickness = 2;
+inside = 12.5;
+$fn=100;
+
+union(){
+    difference(){
+        cylinder(r=inside/2+thickness, h=10, center=true);
+        translate([0,0,thickness])
+        cylinder(r=inside/2, h=10, center=true);
+    }
+}