When I want to use a crosscut guide I just use one parallel guide attached to a rail. I was told by Sedge they weren't meant to be used that way but it works. I tested it for accuracy on a 30 inch door by cutting one long edge with a long rail and then used that edge for reference to cut the ends. I cut one end, flipped the door end for end, and cut the other end, thereby doubling any error. Thing is, there isn't a measurable error ove the 30 inch distance. I can discern about .005 when an edge lines up with a line on a tape and I just can't see any difference at each end of the cut. That's good enough for me and I find it quite easy to use. I don't believe I could machine anything significantly better so this will be my technique for now.