Originally Posted by Dug
Thanks - I've found that the 120 film cannisters that J & C sell are big enough to hold the 616 spool, so if you are looking for something that doesn't require taking the film off the spool in the field, you may want to try them (in the changing bag, of course).
My 616 camera has a spring loaded pressure plate, so film flatness isn't as vulnerable. One thing you might try though to provide tension is small 7/8" fabric pads that are designed to be put on to the legs of chairs, to protect floors. They are just squishy enough to provide some tension. Just be careful to check for shedding.
Good luck with the black chunk.