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Size of Unseen Servant - a function of the knob. TaperPercentage = 20; shaft_is_flatted = true; flat_size = 5 square(top_rounding_radius + pad, top_rounding_radius + pad); rotate_extrude(convexity = 5, $fn = top_rounding_faces 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 = knob_height, $fn = setscrew_hole_faces); // @todo Refactor the top_rounding() operation faster. Everything else is already fast enough to navigate fluently in preview.

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