Well, I've sent a note to Gandolfi, asking them what the hole is for. It must be for an accessory, for for which one? Regardless, it interferes with the grafmatic, so as far as I'm concerned, it's toast. It's quite simple to remove, since most of the aluminum is already gone, due to the hole.
My bet is that the back was designed without taking into account the thickness of the grafmatic, and it's need to seat fully into the recessed notch. After all, grafmatics haven't been made for years. Perhaps the back was designed to work with standard thickness film holders.
Regardless, thanks for the warning! :wink: