I personally wouldn't put foam or anything in my PSU, there's already not a lot of space there for the air to move and it does get pretty hot there. If you're willing to try it feel free to do so and let us know whether it burnt or not though
I guess I wasn't clear. I would not put foam IN the PSU, but on the little "shelves" and other places the PSU comes into contact with the case. It wouldn't be a lot of foam, I think, and I would be careful not to block any vents. I know many people have replaced their PSU fans, but have any used fan isolators when they did the replacement?
Putting foam on the spots where the panels are mounted on the frame would probably do away with quite a lot of vibrations, but I'm wondering how on earth you'll pull that off without your panels sticking out of your case
Heh. I may have to use thinner slices of foam overall, though I'm not sure how to handle the "latches" (ie, where little "hooks" on the panel latch into slots on the case) or the grooves on the panel that slide onto the case. It will require some more thinking and looking carefully at the way the panel interfaces with the case
The PSU-case contacts are also going to be tight, probably tighter than the panel-case contacts. I might have to use a pretty low density foam that can squeeze into these tight spaces. I'll try it out this weekend when I get a spare moment.