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Knob_radius_bottom, external_indicator_height], center = true, $fn = top_rounding_faces cylinder(h = stem_transition_height, r1 = stem_radius, r2 = knob_radius_top, h = engraved_indicator_depth * 2, $fn = top_rounding_faces); // Straight basic stem. Cylinder(h = stem_transition_height, r1 = stem_radius, r2 = stem_transition_radius, $fn = shafthole_faces); // Adapt to a D-shaped shafthole cross-section. 0 to keep labels all.

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