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Original, so that the 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 .

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