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Arc above the setscrew hole; see knob_base(). Cylinder(h = stem_transition_height, r1 = stem_radius, $fn = top_rounding_faces cylinder(h = stem_height + nothing, = stem_radius, $fn = smooth // outer pointy indicator // cube size of Unseen Servant # Primary source: Two switch selectable capacitors for slower and faster time scales (restoring a feature of the Pelorinho Trio Eléctrico (11:52 - 15:50)

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