So, I was able to compare where the mirror hangs with where the mirror on my OM40 hangs, they hang at the same angle. I also used a flashlight to test it, and that had no effect. So it doesn't appear to be the mirror position that's at fault.

I'm curious what the test roll will show, but otherwise I'm done worrying about it. I won't CLA is, as the rest of the camera just doesn't justify that to me (if the body was in good shape I'd consider it, but the body's seen better days).

Thanks for all the insight guys.