Does anyone know who makes the device that you put saddle stitched books into after they are assembled that somehow makes them lay perfectly flat? I was at a demo for a Duplo bookletmeker a few years ago and was shown this device. I thought it was made by Duplo but there is nothing about it on their website. It was an off-line device. We are making some books that will go through the mail and the way they are I think the post office will have a problem with them. Has anyone else seen or heard of this device? Thanks.