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Manifold render(convexity = 5 square(top_rounding_radius + pad, top_rounding_radius + pad); rotate_extrude(convexity = 5, $fn = 3, center = true); hole_depth = max(knob_radius_top, knob_radius_bottom, stem_radius) + nothing; cylinder(r = setscrew_hole_radius, h = engraved_indicator_depth * 2, $fn = setscrew_hole_faces); // @todo Calculate the convexity values based on a regular polygon. ≥30 means.

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