I first milled a rectangle using 6061 aluminum. I followed up with a pocket and milled a slot though the piece.
Here you can see the hole that was drilled and tapped for a
3 mm Allen screw. The end
of the screw was turned
to 1.60 mm
Here is the other side of the piece. After I tapped the hole I mounted it (using the tap as a mandrel) and turned the piece.
Here is an assembled view with the slot rounded off.
Works great! Now I can keep from destroying my motors :)
