Thank you so much for these guidelines. When you stop midway to lift up the mat, how do you do that? Do you gently lift/reposition the mat/fabric with the die tray in place (to the spot under the rollers you cranked it to) or do you back out the tray and sandwich, and then lift/reposition and re-crank? ...I am just amazed the strips can come out straight folded like that, with or without ironing any waves. Thanks again for the advice and confirmation it can be done--guess I will start experimenting with muslin.