The binding techniques that can best accommodate tight registration on crossovers are saddle stitching, loop stitching, double loop, split wire, plastic comb binding, perfect binding, lay flat and sewn binding. Spiral wire and plastic spiral wire are not good choices when crossovers are critical because the registration from page to page will vary slightly. Be sure to check with your sales representative at the onset of your project so we can plan for tight crossovers in your design.