Will the (nicer) focusing screen of of a Nikkormat FT2 fit in the Nikkormat FT-N? Are they the same shape and size? I know that this is an operation that would need to be done by a professional camera repair person. What I'm asking is....if I took an FT-2 and an FTN to a professional and asked to have the FT-2 screen put into the FTN as part of a complete overhaul, would it fit? Thanks in Advance.