Where does the Quicksilver 2002 bring air INTO the case? I read about dust filters clogging in someone's mac on this list, so I thought while I had the Mac open this time (I was installing an extra fan in a PCI slot to help with cooling issues) I'd check that. I couldn't find any grill that didn't have a fan in it (one for the power supply, the main cooling fan, and one for a fan that cools the CPU [not to be confused with the fan ON my upgraded CPU]). This bothers me a bit. This mac is always super clean inside, and ever other mac I've ever cracked open (beige G3 desktop, Quadra 650, LC II, Mac Plus) has revealed dust-bunny heaven. I don't want that, of course, but I do want to be sure air is being circulated properly. It would also be helpful to know how to position the mac to get maximum benefit from the AC (window unit) without maximum dust.