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RingMarkings-1] rotate([0, 0, 90 + sphere_indents_offset_angle + ((360 / sphere_indents_count) * z)] sphere(r = sphere_indents_radius, $fn = top_rounding_faces cylinder(h = stem_transition_height, r1 = stem_radius, r2 = knob_radius_top, h = z height, e.g.

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