I cut a sheet of plexiglass to use for a backplane. The Pi, hub, breakout, etc were all mounted with standoffs and 4-40 hardware. The backplane was then mounted to the cabinet in the same way. This looks like it'll be a really nice way to keep everything organized and from touching/shorting. I also drilled and mounted the handles with fender washers. Everything powers up, but there are lots of small details to finish like the button to take photos and shutdown. A 1.25" hole in the back lets the power cords for the power strip and line switch out.