I know I have seen a pattern in a quilting magazine a couple of years ago, for a big tote that folds in the middle and has sleeves for all of our tools to take to classes, it included room for a cutting mat--so it was fairly large, I think I could do it by experimenting, but if anyone knows of a pattern either free or for sale, can you share? I have been lurking for awhile, and want to jump in. Thanks in advance