Not really.
Removing the old heatsink is the most difficult part, because part of it is screwed, and part of it is clamped to a pin that's soldered to the PCB. The MOSFETs are simply screwed into the heatsink, back to back with a nut and bolt. The bolt can be hard to reach, but it's not too bad.
Then all I have to do is take some careful measurments, make a copper plate that's as short as possible, while accomodating 1/2" copper tubing. Drill a few holes for the MOSFET mounts, and thermal epoxy the diode back on.
Because there's two large sinks in my PSUs, the tubing will run in over the first, and out over the second. Then all I have to do is figure out how to cool that coil.
Either way, I'm adding a 40 mm fan in there, to run silent. If there's enough room, I might simply put an 80mm low profile fan, and undervolt it to run silent.
The main issue I have right now, is securing the PSUs to the drive trays. I'm headed towards removing the PSU case alltogether, and mount the PCB right onto the tray. Then I have to mount the connectors, and that means that I have to have a rock solid bracket.:shrug: Then I have to figure out if there's any way I can have self disconnecting, self sealing, water connections.
