Mounting a Malekko Power on a sheet-steel panel isn’t hard. Assuming you’re drilling holes through, it’s easier than trying to anchor pocket standoffs in a wood case.
All you need is a hand drill, a half dozen machine screws and nuts, and 1/2” spacers. Malekko supplies a drill template in the documentation but it’s unfortunately not to scale and not downloadable to print at scale, so I made this one. If you can print it on 11x17 paper all you need to do is cut it out, tape it on, and use something sharp to tap divots in the hole centers before you drill. (There are a lot of holes, but Malekko docs say you only have to use the six marked with red arrows below.)
EDIT: I can’t upload a PDF, but here’s a PNG:
Fusion drawing link:
https://a360.co/2WLE4Pq