Cool project! This reminds me of Chis Noeding's YouTube Channel, where he's been posting his progress on running custom firmware on the newer Behringer X32 mixers - https://www.youtube.com/@pcdimmer
I'd recommend checking out this Van building YouTube channel if you're interested in using extruded aluminum for van building. https://youtube.com/c/HumbleRoad
It goes in depth on the topic, as that's the main method he uses.