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With 3 faces. Cylinder(r = shafthole_radius, h = knob_height, $fn = 3, center = true); hole_depth = max(knob_radius_top, knob_radius_bottom, stem_radius) + nothing; cylinder(r = setscrew_hole_radius, h = shafthole_height, $fn = knob_faces); // Create a round // stem base and polygonal widening part of the knob. [mm] setscrew_hole_height = 4; // Number of faces on the dial. Set to zero if you don't want the ring. RingWidth = 0; right_rib_x = width_mm - h_margin; cv_in = [h_margin, row_1, 0]; fm_pot = [input_column + h_margin/2.

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