Sorry to revive a slightly old thread but I have a similar question about the FX-3 and FX-D. I have an opportunity to pick up one of each cheaply (off the big auction site), both described as parts cameras. I could use the FX-3 parts regardless, as I have another FX-3. It seems that the FX-D just needs a new pressure plate, and I'm wondering if this part is the same on both cameras. The FX-3 in question does have a pressure plate but has other issues. I might be able to make one working FX-D out of them. So, does anybody know if the FX-3 pressure plate will fit the FX-D?
EDIT: I was going to respond to the comment below, but I have cameras to work on.