You can still use them. I have a couple shelves where they can't stand upright but I can certainly put them on the sides as I have done. There's a tutorial that show's how to fold them so you can still see the print of the material. I have also used some of the boards for templates. it will cost more to send those boards out than what you paid for them. Hang onto them for future use. Or you can also follow "barny's" idea.