use use use translate([0, 0, 10]) spoolmount_a(); spoolmount_b(); translate([0, 0, 5]) difference() { cylinder(h=5, r=42, $fn=500); translate([0, 0, -1]) cylinder(h=7, r=25, $fn=500); torus(r_major=33.25, r_minor=3.5, ys=1.4, $fn=500); }