Two things:
1) Screws need to not short out the board, duh! The last pictures I saw of Aardil's design don't have this problem, thankfully.
2) Overcurrent protection is a very basic design issue. Has Vantec not yet heard of the fuse? Works really well even when you accidentally short out the board while you use scope probes.
Better to replace a ten cent fuse than a sixty dollar board. Of course, Radio Shack sells a ten cent fuse for a dollar, but that's a different issue.