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3 4 <- this is the main (cylindrical or conical) knob shape, without the stem. [mm] stem_radius = 5; $fn=FN; /* [Panel] */ printer_z_fix = 0.2; // Padding to maintain manifold render(convexity = 5 square(top_rounding_radius + pad, top_rounding_radius + pad); circle(r = top_rounding_radius, $fn = top_rounding_faces square(top_rounding_radius + pad, top_rounding_radius + pad); rotate_extrude(convexity = 5, $fn.

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