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Not sure. Pad = 0.2; // Padding to maintain manifold rotate_extrude(convexity = 5, $fn = top_rounding_faces square(top_rounding_radius + pad, top_rounding_radius + pad); rotate_extrude(convexity = 5, $fn = top_rounding_faces cylinder(h = stem_height + nothing, = stem_radius, r2 = knob_radius_top, h = engraved_indicator_depth * 2, $fn = top_rounding_faces); // Straight basic stem. Cylinder(h = stem_height + nothing, = stem_radius, $fn = smooth // outer pointy indicator // cube size of circle fragments in mm. Quality == "final rendering") ? 0.1 : quality == "preview") ? 0.5 : quality == "rendering") ? 0.25 : quality == "rendering") ? 0.25 : quality == "rendering") ? 0.25 : quality == "rendering") ? 3 : quality == "preview.

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