My setup for roll paper is cheap and works well. I made a holder for the roll similar to the metal counter type but mine is made from a wooden dowel and plywood for the support stands. I have a small darkroom so I lay a piece of plywood with a wooden yard stick screwed to one edge from my wet side to my dry side. I roll out the paper to the size I want and use a metal door threshold and razor knife to cut. To take the curl out Freestyle sold cardboard mailers up to 24 x 30 with the black inner bag. Cut up what you need a day or two ahead of time and it's all flat when you want it.