I'm having trouble with the master roll attaching to my riso rp drum W, it keeps jamming before getting to the drum but when I swap out that drum with one of my others, the master has no problem. I'm completely baffled and wasn't sure if my drums are different sizes and my machine isn't letting me know to change the size, not sure how to tell them apart, because a warning is suppose to pop up, but what if that was malfunctioning? Any help would be amazing, thanks
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