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Out wall(h=4, w=width_mm-hole_dist_top-4); // one more vertical to mount the circuit board sideways on // h = shafthole_height, $fn = top_rounding_faces); // Straight basic stem. Cylinder(h = stem_transition_height, r1 = stem_radius, $fn = setscrew_hole_faces); // @todo Calculate the convexity values based on https://www.schmitzbits.de/ms20.html which is what MK uses a CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and.

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