I used this guide for my mid-2012 model (because I thought it was a 2010). It was very similar. The Torx screws were a T7 instead of a T6 and the subwoofer connects with the airport card (instead of the airport card being inside the clutch). I suspect there is a more specific guide on this site. :)
lol… turns out mine is a mid-2012 model. That accounts for the different screw head. But the 6mm vs 6.5mm still use the same driver if they’re both T6.
The 6mm vs 6.5mm is the length of the screw. It is still a T6 head (although mine was a T7 for some reason). I think the middle screw on each side is 0.5mm longer.
I was replacing a clutch cover that had cracked into a few pieces. I found the replacement didn’t slide to the left on installation. On further investigation I found the tabs from the old one were broken off inside where the cover slides. Once they were removed the install wen much better.
I found my replacement cover on Amazon.ca in case someone needs a Canadian source.