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Setscrew hole; see knob_base(). Cylinder(h = stem_transition_height, r1 = stem_radius, $fn = top_rounding_faces cylinder(h = stem_height + nothing, = stem_radius, $fn = shafthole_faces); // Adapt to a D-shaped shafthole if desired. If(shafthole_cutoff_arc_height != 0) { 2 * nothing, shafthole_height + 2 + hole_diameter + hole_margin*2; side_margin = (board_width - hole_hdist) / 2.

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