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12; // Number of faces around the top square(smoothing_radius+pad,smoothing_radius+pad); rotate_extrude(convexity=10, $fn = 3, center = true); // The Trenches // The OpenSCAD default. // (3) MAIN MODULE knob(); // Entry point of the knob. TaperPercentage = 20; // tweak on this one, Number of faces around the top.

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