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V_margin+12; // draw a "vertical" wall // h = shafthole_height, $fn = top_rounding_faces square(top_rounding_radius + pad, top_rounding_radius + pad); circle(r = top_rounding_radius, $fn = 3, center = true); hole_depth = max(knob_radius_top, knob_radius_bottom, stem_radius) + nothing; cylinder(r = 8, h = shafthole_height, $fn = smooth // outer pointy indicator // cube size of 8 minimum.

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