[magnets]

I'd recommend replacing the metal enclosure with some standoffs, then if you need to, put thin lexan shields around it. Also, the CIM motor shaft isn't supported on both ends, so you don't really need the outer plate to be that big, and you could make it about half size. Also, you could probably get away with making some holes in both plates, depending on their thickness.

I can't tell from the image, but it looks like the CIM is held on by two screws. It's a better idea to make the top of the CIM flush with the plate, and cut a 0.75" hole in the plate for the top of the CIM to sit in.