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Additions. Cylinder(r1 = knob_radius_bottom, r2 = stem_transition_radius, $fn = top_rounding_faces); // Straight basic stem. Cylinder(h = stem_height + nothing, = stem_radius, r2 = knob_radius_top, h = knob_height, $fn = 3, center = false); z_position = sphere_indents_radius .

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