have you checked @BadGoldEagle 's current project?
Thanks for pointing it out. I have seen it but I have reservations about it. It's certainly one way of doing it (and it looks very tidy), but it's just as easy to wire up an ATX PSU without needing those boards. Also, I'd rather not have the mains voltage going into a hobby PCB (no disrespect meant here at all, I am just not familiar with the requirements necessary to design a PCB to ensure it can take mains voltage safely). IMO it's much safer to have the mains voltage going directly to the new PSU.