I am considering selling my 2013 MBA (which has AppleCare until June) and replacing it with a 13 rMBP when the new ones come out. The display+assembly has just been replaced by Apple so it looks brand new, but the lower case has a few scratches. If I bought a lower case from iFixit or some other seller, it will not have my MBA's serial number at the bottom. This will be obvious to the 'Geniuses' at Apple if the laptop was taken in. Would this void AppleCare? P.S: Obviously if the Skylake rMBP don't come out until after AppleCare expires, then this question is moot.