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= knob_height, $fn = top_rounding_faces); // Straight basic stem. Cylinder(h = stem_transition_height, r1 = stem_radius, $fn = top_rounding_faces square(top_rounding_radius + pad, top_rounding_radius + pad); circle(r = top_rounding_radius, $fn = top_rounding_faces cylinder(h = stem_height + nothing, = stem_radius, $fn = sphere_indents_faces); height = 128.5; // A little less then 3U // Thickness of module (HP) width = 10; //knob_radius top_row = height / 2 + hole_diameter + hole_margin*2.

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