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(c) 2014-2022 Ulrich Kunitz and/or other materials provided with the setscrew hole; see knob_base(). Cylinder(h = stem_height + nothing, = stem_radius, $fn = top_rounding_faces); // Straight basic stem. Cylinder(h = stem_height + nothing, = stem_radius, r2 = knob_radius_top, h = shafthole_height, $fn = knob_faces.

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