I had to drop back to one of the 300W PSUs as the connections on the 400W wouldn't fit flush with the back of the case. It's just on its first proper power-up. I've popped in a 80gb hard disk, hooked up everything and booted off the AHT disc I downloaded from Apple. It's just passed the extended hardware test.

I was toying with the idea of swapping out the case fan for a PC one which would have had a standard fan header. But while rummaging around in my magic box of cables I found a cable that had the same "fan" connector that was on the original PSU. So I popped one end of it and stuck the wires into a couple of molex pins and made a molex fan adaptor.

Surprisingly the PRAM battery is actually still OK. It even looks like it might be the original one (one of those green SAFT ones). Only thing that's puzzling me right now is I'm still not getting a startup chime. But for now the next step is to tidy up the cabling inside.