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See knob_base(). Rotate([0, 0, 45] cube([2, 2, KnobHeight+.001], center=true); cube([RingWidth*.5, MarkingWidth, 2], center=true); cube([8, 3, KnobHeight], center=true); // Pointer1: Offset hemispherical divot // Flat for D-shaped hole // Hole for setscrew // Make sure bottom ends at z=0 KnobMajorRadius+RingWidth) * 3, 20], center=true); .

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