I have a custom hypercube evolution that is enclosed. I don't like how the duet is currently mounted and wanted to make an enclosure that could hold a couple of fans as well. I have not made this yet, so it is a work in progress.

Use .25" diameter and .125" thick magnets on the base and cover so that the cover can easily be removed and reinstalled - no screws necessary.

Did a couple quick renders in F360 as well, just for fun.