Today while removing my second optical drive something horible happened. I finished removing it and slid the optical drive carage back into place. I then booted my computer to be met with the smell of burning computer equipment, I quickly powered off the comp and opened it up. The smell was coming from one of my hard drives. I pulled the optical drive carage out and examined it, everything seemed ok, then I noticed a strange kink in one of the 4 wires of power conectors for the optical drives. Unpon examination I saw that somehow the drive carage had pinched the wire cutting through the insolation and making contact with the live wire. Meaning that the entire aluminum case of my Mac Pro had power pumping through it. Unfortinetly one of my 250 GB hard drives (the one with all my projects) got fried, it no longer spins up and I lost all my data (about 4 months of work since last backup and a number of things that were too large to backup to any of my other drives). All thanks to bad engenering on apples drive carage. So beware when you are adding or removing optical drives from your Mac Pro's. Jeff P.S. Yes it douse seem like I'm having more than my share of bad luck lately.