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Main (cylindrical or conical) shape. [mm] knob_radius_bottom = 10; // 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 = knob_faces); // Create a hole for mounting screw: ISO 1481-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1757491 12A || order number: 1776977 12A.

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