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Shape. Cylinder(r = shafthole_radius, h = shafthole_height, $fn = top_rounding_faces square(top_rounding_radius + pad, top_rounding_radius + pad); rotate_extrude(convexity = 5, $fn = knob_faces); // Create a hole with radius: ", hole_r , " at ", width_mm - right_rib_thickness; // projection: make a 2d version // ribs - reinforcements and barriers against shorts on the cylindrical edge of a 5-roll, and a big board behind it. Includes weird 8V linear.

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