I got my mains AC switch, remote turn on relay, and cable raceway today. The mains switch is now in, and I will try to solder the 12V trigger wires this week. My decorative front panel push button is back ordered for a couple weeks, so i will need to work on that part later.
You can see the amount of free space left in the chassis; I am still figuring out what to do and might drop the idea of the 12V remote power supply. I picked up a cheap 12V 10A power supply from Amazon, but either I measured wrong or they didn't advertise correctly because it is a tad too big. I'm not sure if it is really worth the effort to integrate this supply or if there is a better way to use the space in this enclosure, because I realize now that I really need a couple 12V outputs and a 5V output.
I have space to park the MiniDSP unit next to the 11th channel board, which leaves me quite a bit of space near the front. Two of the MiniDSP channels will feed my Sanway amp and ported 18s, and the other two channels are TBD
but I machined the back to accept enough plugs for all four outputs. It looks like I could actually fit another couple higher power boards in the front, tied right into channels 3,4 of the MiniDSP to drive some near field subs behind my couch (maybe a couple VBSS or those new DIYSG 12 driver?). If I can find boards that fit, I am thinking about leaving some space for these additional amp boards and adding three 92x17mm fans in the remaining space to help keep everything cool.
Actually the sheet metal is the only marginally hard part because you need access to the equipment and a bit of specialized know how, otherwise it is just wiring and assembly. If you surf diyA you'll see plenty of hardcore people fabricating their own boards and can find plenty of project ideas, but most seem to be making unbalanced 2 channel rigs. I am certainly happy to help anyone interested.