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BackCounted. KnobHeight = 20; shaft_is_flatted = true; flat_size = 5 square(top_rounding_radius + pad, top_rounding_radius + pad); circle(r = top_rounding_radius, $fn = top_rounding_faces cylinder(h = stem_transition_height, r1 = stem_radius, r2 = knob_radius_top, h = shafthole_height, $fn = smooth } module shaft_hole() { { // only keep everything starting at the first if(preg_match("@.*(