I really like the idea of the Field Notebook. I have one problem that is keeping me from ordering one. I don't want to have to deal with yet another punch system. I already own a circa punch, filofax personal punch and a standard three-hole punch. Is there any way that the field notebook could be made in such a way that the user could slide in a notebook or sketchbook of their choosing? Sort of the same way checks slide into a checkbook. I would really prefer this as I could use notebooks with microperfs and then punch (or not punch) the pages however I saw fit. Please??? Thank you!!