Thanks for all the info and pictures! I was curious about this part of it, because I've been having the same issue with my NPR, which has the same motor as yours. At first I thought it came to rest randomly, but then quickly realized that it couldn't random to always land with the mirror out of place. Is the idea that I would run the motor, let it stop, then remove the motor and inch the mirror around until it was centered? I've been struggling to find those guide marks. Thank you!