Quote Originally Posted by DeathWalking View Post
I don't know whether they're a "bad idea", per se, just that I get ride of them/don't like them. And sure, your idea about the fan is good in theory, but the problems with the fan hole lining up with the actual fan, plus the lack of real benefit (plus the fact that PSU airflow could be severely impeded by a thick single-slot card in the last PCI slot) just makes it more trouble than it's worth. Besides, on a heavily WC'd system, airflow isn't that important.
OK, I'm thinking lets compromise. Remove the hole, but make the area above the PSU out of mesh or perforate it? Then put a hole in the PSU support bracket. That way, you can mount the PSU which ever way up you prefer...