Yeah, it does/did. But it wasn't as bad since everything was out already. But it's always nerve-wracking when you're removing/replacing something in the optibay. There's a lot of wires there that I could accident pull off or something else. But, glad I didn't. However, I think I may have to pull of my cover again. One of the screws doesn't fit in correctly, it's halfway in (lower left corner). I scratched myself earlier so I put tape on it. Sooner or later it's going to bother me. Might as well do it now.
I just hope that this is the last FW update I need to do. And I wonder if this problem was enclosure specific. I mean the one I got was pretty cheap but it works like it should. But, probably not good enough during a process like this. I'll maybe have to look into OWC's SuperDrive's enclosure.