I just bought a new ssd trying to self install it onto my 13 inch MBP. I am able to unscrew the back cover, then when I try to unscrew the hard drive bracket, I got one of it off, but the other one seems to be overtightened or stuck, no matter how hard I try, it just wont come off. I am pretty sure the Philips screwdriver I use is the right size, but I would like to know which size do you guys use for the bracket's screws. Is there anything else I can try to get it unscrew? Or can I just bring it to the Apple store and ask them to install it for me (does it cost me any money?) Please help, thanks!!