Heat-sink as add-on?

[rahlquist]

The only issue there might be with that retention idea is the conductive wire- it could easily be PlastiDipped or something though.

Yep fair enough point. That is why I passed it to the screw holes as well though, keeps the whole wire at the same ground potential. I would make the assumption that the IC's are not conductive case. For precaution though after bending plastidip or magnetic lacquer finish could be applied. I might just give this a shot.