Looking for one or both, prefer 5X7 if I can only have one. I have a super nice Korona V Full Plate 6.5 X 8.5 camera that I am restoring and since there are more people out there that shoot film vs wet plate I would like to buy a couple of backs to engineer an interchangeable back system. This way the buyer (when I am done restoring it, it will be for sale) will have the option to shoot all three formats with one camera. (I know you wanted to know all of that) Anyway please shoot me a PM with your offer and price. I will definitely need photos to verify that the back will fit my needs for modification. Thanks!