I successfully installed my 8GB of RAM, but when I tried to install my SSD, I was stuck. Turns out, Apple decided to use torx screws for their hard drives. They have these little screws that act as "legs" that fit snuggly with the computer. It prevents the hard drive from shaking too much, and resists sudden movements to the hard drive. I do need these legs on the new SSD, so I'll need a T6 torx screwdriver. It turns out I can't install tonight! Luckily I found out about this now, instead of knowing about it later.