I have a 4X5 R.B. Series D Graflex. While it is in pretty good shape, I have been warned not to bee too tough on the shutter. So I have figured a way to put a modern 210mm lens and shutter on the beast. The camera came with a few film holders and I have purchased a few others for this camera since this camera does not have the standard grafloc back. THe cut film magazine came with the camera. It holds 12 (yes 12 or twice that of the grafmatic system). The septums appear to be in good shape. It is prettyy easy to see how to load the magazine, and it appears to be a leather bag into which the septums are pulled after exposure. The question is this. After pulling the exposed septum into the leather bag, does it stay there or is it pushed back on to of the on-exposed septums? My guess is that the exposed sepyums remain in the bag. It is kind of a neat system that the ancients designed to replace 6 standard holders and for fast shooting!