I've got a Rev A MBP that I'd like to upgrade with an 802.11n wifi card. Problem is that I've got Apple Care on the system, and I'd like to keep it that way. Swapping out the card isn't a problem, I worked as a Dell Notebook repair tech for awhile, so I'm not worried about that part of the scenario. What I'm wondering is if I swap out the card, and then if I run into problems where I need to use the Apple Care in the future, swap it back... will I be in the clear? I've already had the logic board swapped out on this machine, so it's not factory fresh inside.