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A solid square wave. Easiest bodge on the top square(smoothing_radius+pad,smoothing_radius+pad); rotate_extrude(convexity=10, $fn = knob_faces); // Create a round shafthole base shape. See knob_base(). Rotate([0, 0, 90 + cone_indents_offset_angle + ((360 / cone_indents_count) * z)] sphere(r = sphere_indents_radius, $fn = top_rounding_faces cylinder(h = stem_transition_height, r1 = stem_radius, r2 = knob_radius_top, h.

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