How about suggestions for a large darkcloth for an 8x20? My 8x10 cloth works okay for 11x14 but no larger. For clarification I need a cloth that will go all the way around with room to spare. Not too keen on the models that attatch directly to the camera as well. Is there a commercially available darkcloth this large? If not I could always make one. Anyone out there ever made a large one this size?