Oh well, I guess this counts as my PSU modding entry.
One SPI220LE 220W power supply.
One Antec Basiq 350W ATX power supply.
One Nexus 8cm fan
Fan mounting hardware
Copious quantities of heatshrink
Some random bits of wire.
Remove the cover from the SPI220. Discard cover. Cut the fan free and discard. Cut the wires to the 24 pin motherboard connector a couple of inches from the PCB. Discard connector.
Remove the cover from the Antec Basiq. Remove the fan and PCB. Cut the 24 pin motherboard connector off, a couple of inches from the PCB. Discard everything but the case and motherboard connector.
Graft the Antec motherboard connector onto the SPI220LE PCB. Use plenty of heatshrink to keep it neat.
Solder the 8cm Nexus fan where the little 40mm one went.
Solder some mains lead where the SPI220LE IEC connector went, and extend it to the IEC connector in the Antec box.
Put some 3mm spacers in the base of the Antec box, to mount the SPI220LE PCB.
Do all the screws up.
And Viola. An SPI220LE in an ATX case
Here is is from the back. You can see the 8cm Nexus fan. It spins really slow under normal operation. I added an IEC outlet, which will eventually be wired via a relay to the IEC inlet. That's what the heatshrunk 12V and ground wires are for at the back of the case - I'll wire them to the relay coil.
From the front. This provides a better view of the fan, which is mounted on a silicon mount. The SPI220LE PCB was a very easy fit in the Antec case. There's still gobs of room.
And from the side. Most of the work involved replacing the cable to the motherboard connector, as the one that was on the SPI220LE was too short by about 3".
It's a big improve over my old Corsair HX520W for this machine. Idle power consumption (measured with a digital oscilloscope and some math) has dropped from 70.8W to 62.8W.