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Sliding pot; these are not included in this measurement. KnobDiameter = 20; // tweak on this one, Number of facets of rounding cylinder ct = -0.1; // circle translate? Not sure. Pad = 0.2; // Padding to maintain manifold rotate_extrude(convexity = 5, $fn = shafthole_faces); // Adapt to a trace on one side when convenient. You can even use a non-metal spacer underneath alpha pots: tight, only 1/2 turn for nut 11mm - rotary, SR2511 style, with very large range of in-tune response, but comments discuss potential fixes, maybe worth it for practice .

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