[macr0w]

The guys at Castle told me once that unless you do some soldering on the board your warranty will be intact. Modifications to the case should not void the warranty.

Don't take my word for it though.

I have modified every MMM I've had. But the mods I have done are just to use an aftermarket fan wired to the receiver and to cut out the grill on top. I also drill a few holes in the case around the caps for ventilation.