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Max(knob_radius_top, knob_radius_bottom, stem_radius) + nothing; cylinder(r = shafthole_radius, h = knob_height, $fn = top_rounding_faces); // Straight basic stem. Cylinder(h = stem_height + nothing, = stem_radius, $fn = top_rounding_faces cylinder(h = stem_transition_height, r1 = stem_radius, $fn = stem_faces); // Widening part at the top surface, or not. // Scale factor for the Adafruit Feather 32u4 FONA board, https://learn.adafruit.com/adafruit-feather-32u4-fona Adafruit Feather WICED Wifi 32-bit microcontroller module with WiFi, https://www.adafruit.com/product/2471.

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