I have recently acquired a Rondinax 60 developing tank for processing 120 film. So far I have run 4 films through it. Every time I have used it the last frame to load collapses in the spiral and touches the underlying layer causing it not to be developed. I can feel increased resistance as the last frame is spooled out of the film chamber, and no mater how gently I try to ease the last frame out it always sticks. Has anyone else encountered this problem with a Rondinax tank? I am considering trying to get a Kent 20 tank as, if it is built like my Essex 35 35mm tank it is far more robust than it's continental cousin, pictures I have seen indicate the spiral is much deeper than the Rondinax spiral. Alternatively It may just be better to fork out for a Lab-Box, a brand new daylight processing tank built along the same principles as the Essex and Kent tanks. I dislike hand loading spirals in the dark intensely, hence my use of daylight loading tanks. Suggestions please.