Hi everyone. Didn't see a forum for repair and such, so I hope this isn't the wrong place. I just got an FA on ebay, and the DOF preview lever is stuck. Very stuck. I haven't found much info about this other than Ken Rockwell saying to be careful about getting one with it stuck and that it probably means the Aperture control pin is stuck and that it will probably only shoot wide open, and another thread where it was mentioned to try dry grease or lighter fluid (which I haven't picked up yet to try.) Just thought I'd check and see if anyone had experience with this - either on a Nikon or anything else, it's probably somewhat similar on other manufacturers I would assume. Anyway, thanks for any help!