I just purchased a Mid 2012 Macbook Pro, and I've been thinking about upgrading the Hard Drive to a faster 7200 RPM one. I talked to an Apple Care rep, and I was told that replacing the Hard Drive in this model may void my warranty... strangely it was okay in the Late 2011 and prior models. Can anyone confirm this, is this particular rep correct? FYI, he also said that upgrading the RAM voids the warranty, but I found an Apple support article explaining how to do it in this model. Thanks.