A few months ago, one of the feet on my laptop fell off. I called Apple hoping they could send out a replacement, but AppleCare personnel insisted the foot was attached at the factory, and I couldn’t do my own repair. So, after a few calls, insisting that I have been disassembling laptops for over a decade, I relented and took my machine in for a bottom case swap. At that time there were no other problems with the laptop. When I got the machine back, the next time I used the optical drive, it no longer worked. I had to take it in again and have that swapped.