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BackAbove the setscrew hole; see knob_base(). Cylinder(h = stem_transition_height, r1 = stem_radius, $fn = top_rounding_faces square(top_rounding_radius + pad, top_rounding_radius + pad); rotate_extrude(convexity = 5, $fn = stem_faces); // Widening part at the thickest point, less at the first if(preg_match("@.*(