My cuts so far are extremely simple and not applicable to this discussion. I chop the film at 8 inches and load into holders. That said, I tried once to make a jig to cut 70mm film down to 120 and it was a dismal failure on every level. When I had the 8 circut and cut some 9 1/2" down to 8" it was startlingly difficult and I didn't achieve a clean edge. I believe my rough edge caused some of my banding in my one cirkut exposure so far. I doubt if it's possible to cut cirkut film to rollfilm sizes successfully unless you've got industrial equipment made to do it.