Water damage to 2011 MBP 13"
I didn't order the T6 torx screwdriver. I was able to go only so far in my tear down and dissassembly, and ended up stripping out a few of the tiny, soft, aluminum screws that were T6 instead of the T5 that I ordered.
Don't be in a hurry, buy more tools than you think you'll need, because you'll need them :-)
T5 Torx Screwdriver
P6 Pentalobe Screwdriver 2009 15" MacBook Pro Battery
P5 Pentalobe Screwdriver Retina MacBook Pro and Air