I am planning on shooting some 70mm stock in my Hasselblad, have the back and a total of 4 cassettes and one take up spool. The film has to be in 220 length for dr5 process so I plan to cut the 20 foot rolls into 4 / 220 lengths and load them into cassettes right away, probably still store them in a dark bag until used. So I figure since I am going make about 40 rolls of this 220, it might be a good idea to craft up a rolling jig. I am going to do this in my darkroom, so the jig could be a simple tensioner / spooling station. Any slick ideas for this job?