Air/electrical boxes

I was discussing with my cousin some 2-3 years ago about needing to plumb and wire my shop. He sketched out his idea, I took it to 3D modeling software, made a few test units before cutting the final ones out of 14ga stainless.
Finally have a fire lit under my butt with child #2 on the way. Working on building an additional room, but wanted to wire and plumb the shop. At least half way.

Used pop rivets to hold the 1900 box on the bent metal tabs.

I plan to make a stainless frame one day and dress up the face. Covering the corners and completing the install. Ran pex for air line.