I'll throw some up a bit later, sure. It's not super pretty, I used standard through hole electrolytics and tantalums. I noticed mine had that backwards silkscreening on the -5V filter cap. I've thrown the PSU on the scope and it's fairly stable now, beyond the usual noise expected on the 12V line when the HDD spins up.

Interestingly though, I have determined the source of continuing problems - the large "VLSI" chip in the centre of the board. Is this the SWIM floppy controller, or something else? I can generally run for a while before the machine crashes, and reboots fail with the Chimes of Death. Cooling this chip then allows the machine to boot again successfully. I'm hoping it's a poorly adhered pad or something similar moving due to thermal expansion, and not a bad chip - it looks beyond my current skillset to replace and there's obviously no ready source for that chip.