Quark fried, blown capacitor...

[suicideneil]

I would make a longer mount so that the whole pcb & connectors are supported/protected. Still mount it too a thick piece of alloy though for better cooling, just incorporate that into mount. I wouldnt mess with the case though just incase it does need repair at some point. What about a piece of alloy box section abit bigger than the case is, and mount the pcb inside that (with a window cut into it for programing ). It would protect the whole pcb and provide a massive surface area for cooling.