The motor on my Late 2008 MacBook Pro unibody's optical drive died, so my optical drive doesn't work. When I enter a disk, it makes a few sounds reminiscent of a dying animal, then spits the disc back out. This is a result of something falling on the upper right part of the computer, damaging my drive. So should I buy a replacement optical drive or an external one? I really only use my drive whenever I'm loading an OS, that's literally the only time I use it. So attaching an external drive isn't an issue. Both the replacement drive and the external drive are around the same price on Amazon, but with the replacement drive, I would be worried about breaking something since it involves removing a couple of cables from the logic board, and prying one up.