Thanks folks. Looks like CLA is... well, the answer in this case.
I read somewhere that Nikon is enforcing that all Nikon work to be done by Nikon themselves (and independent techs can't do any work)? Is this the case? Or maybe I misread?
Anyways, I will probably have to send this to Nikon but curious if there are any specialty techs who work on Nikon F3's who do some fabulous work? I've heard of Erik for Pentax and John H for Olympus OM....