I decided to do the 10 minute square. Boy, cutting the material is a big undertaking because they fray so much! Also aligning the edges with pins & taking them from the table to my sewing machine is a pain. so what I did was run the edges thru the candle flame to prevent fraying. The result is ok, but pretty bulky. will post pics soon. I've finished 9 squares but cannot decide what to use for backing. any suggestions? should i also use batting in the middle?