Tom, I have a Busch Pressman C original and very nice. It has a spring back and I would like to have a graflok back. I found a spring back, just the back, and I am thinking of how I will rebuild it as a Graflok back. I want to be able to use roll holders and the Graf 23's are really a tight fit. If I am cleaver enough I can use film holders and roll, Graf. Let us know what you come up with. I too think it would be more usable.