I have a "L" shaped pc. of aluminum that my pro shop milled for me, it has a 1"step so that when I eventually attach it to my cutter all I need to do is cut and spin then cut again.I say eventually because I picked up a 5x7 field camera and just haven't gotten back to my 2x3 yet. Oh BTW there is a tool that will notch the corner of your cut film for you just like the factory sheets. Mine looks just like a single hole punch but has a corner stop and only nips a half hole from the edge of the film. Don't know who makes it mine is just stamped "JAPAN".