Mid-2012 MBP. I upgraded the RAM tonight and decided to trace down the tinny rattle that has been getting progressively louder as I type and click. I pulled the hard drive to rule it out since its an easy task and it wasn't the hard drive. Tapped the SuperDrive and found it. I can make the rattle happen by tapping along the right side of the keyboard and by directly tapping the SuperDrive, and the upper left corner of the SuperDrive has a good amount of give. Is there a known fix for this I haven't discovered or is it a SuperDrive problem? It is significantly louder than when I first got the computer, it happens when typing anywhere on the keyboard or clicking the trackpad.