I recently bought a 9x12 Voigtlander Bergheil along with some plate holders. Unfortunately none of the plate holders came with film sheaths so I'm on the lookout for some. However I am wondering about the sizing. I also have a 6.5x9 Voigtlander where the plates are 6.5x9 but the cut film is slightly smaller. I presume this is because the film sheaths have to be a bit smaller to fit inside the plate holders. Is it the same with 9x12? Or to put it another way - when I do get the 9x12 film sheaths, will 9x12 cut film fit in properly?