What about making uncut 46mm spools like Ilford does? We can hand roll.
OR better would be to roll it WITH backing paper as a continuous roll of paper but the emulsion spaced out with notches in the paper where we cut in the dark and can hand roll onto spools without worrying about being off with the emulsion placement and numbers?
That would need new machinery.
Another alternative would be cutting 46mm film rolls and 46mm backing paper and selling both rolls as a set.