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Max(knob_radius_top, knob_radius_bottom, stem_radius) + nothing; cylinder(r = 8, h = shafthole_height, $fn = top_rounding_faces square(top_rounding_radius + pad, top_rounding_radius + pad); circle(r = top_rounding_radius, $fn = sphere_indents_faces); height = cone_indents_height + 2 * nothing, shafthole_cutoff_arc_height + 2 * nothing, shafthole_cutoff_arc_height + 2 * nothing; z_position = sphere_indents_radius + (enable_stem ? Stem_height : 0) + knob_height .

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