Hey guys, I just purchased a 13" rMBP and I was looking into getting a hard case for it since I'll be using it in the lab all day then bringing it home too. Anyways I spoke with one of my friends who fixes computers for a living, he told me that the rMBP has an aluminum unibody which serves as a heat sink for the whole computer, and that a case will cause it to over heat. Anyone have this experience? Or is it safe to toss a case on the computer? Thanks guys.