Now for the PSU. Amazingly, it fit right into the rear cover for the console! It kind of snaps in. It's not tight enough to be considered permanent, but it's good enough for a test fit.
Plenty of room!
I'm not sure how I will permanently mount it, maybe with plastic "rivets". You push them through a hole and then push a center pin into them to flare the ends and secure them.
That's all I have right now. Hopefully I can finish the mounting of the mobo and PSU by the weekend and start on drives, USB hubs, foldout monitor, etc. Wish me luck!