Alright so I've been following this forum for a while and have been looking for forums about whether or not upgrading you RAM and HD void your warranty. SO far I've pieced this together. HD is user replaceable and RAM is not....But obviously if you put the old ram back in apple would never know theoretically. I was just wondering for some input, maybe from people with stories about their computer ex. having to install old ram etc. and how the process went. I'm just paranoid because I'm putting a lot of money into this machine, including the extended warrant and upfront cost, and don't want to be screwed if something get messed up.