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Setscrew hole; see knob_base(). Cylinder(h = stem_transition_height, r1 = stem_radius, $fn = 3, center = true); hole_depth = max(knob_radius_top, knob_radius_bottom, stem_radius) + nothing; cylinder(r = 8, h = knob_height, $fn = stem_faces); // Widening part at.

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