I do admit I could be mis-remembering what the exact details were. It was some kind of replacement part. These were solid professionals though. The context was when you had to take a camera on a trip somewhere in the world and having the camera fail to function was not an option. I've disassembled A-1 and AE-1P tops on my coffee table before (me! of all people!), so if you have a good place to do it, you can probably do any kind of repair.