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Divot // Flat for D-shaped hole // Hole for shaft cutout // set screw hole. ≥30 means "round, using current quality setting". Sphere_indents_faces = 16; // Distance of the indenting spheres, measured from the top rotate_extrude(convexity=10, $fn = top_rounding_faces square(top_rounding_radius + pad, top_rounding_radius + pad); circle(r = top_rounding_radius, $fn = 3, center = true, $fn = stem_faces); // Widening.

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