I have two MBPs, both of which have problems, so I'd like to take the parts and combine the two machines into one. I'm planning to use all the guts (logic board, hard drives, etc.) from a 13" early 2011 MBP, and put them into the body/display/battery from a 2009 MBP. Any reason that wouldn't work? Any differences in the iSight camera or battery or anything else that would mess me up? It seems like I should be able to just move the parts from one machine to the other, but if the batteries or cameras or speakers from 2009 aren't compatible with the 2011 hardware, then I might have problems. Any thoughts?