I have 6 Grafmatics that I've used for many years, and I only ever had one failure; and I really think that one was my fault. If the septums are flat and straight, film is loaded properly into a septum, and they're kept clean, you should not experience any failures. The space saving is negligible in that you're only getting a couple of more shots--the Grafmatic eliminates one conventional film holder. One major advantage that I enjoy with the Grafmatic is that I never have to worry about light entering from the slider side of the holder and fogging my film. I've had blazing Arizona sun directly on the slider side of the Grafmatic and never had an issue; can't say the same for my conventional film holders.
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