I cut double sided X-Ray, which is very easily scratched with a cheap Costco cutter. I use the chop blade, it also has a rolling round blade. I set up matte board stops with gaff tape and cut one piece at a time. Usually 7x17 Kodak CSG which needs only 3 cuts to produce 3 sheets of 5x7. Since it's X-Ray I can do it under LED red light.
With all that practice, normal film is easy under full dark.