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External indicator is sqrt(2*knob_radius_bottom²). First we move it back from that // most outward position to point out as specified. Cube([knob_radius_bottom, knob_radius_bottom, external_indicator_height], center = true); hole_depth = max(knob_radius_top, knob_radius_bottom, stem_radius) + nothing; cylinder(r = shafthole_radius, h = shafthole_height, $fn = top_rounding_faces); // Straight basic stem. Cylinder(h = stem_transition_height, r1.

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