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For (i=[0 : RingMarkings-1] rotate([0, 0, 90 + cone_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, $fn = shafthole_faces); // Adapt to a dual or quad would add very little cost even without 1v/oct, could be done.

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