I am finishing a baby quilt w/a flannel backing. After much advice on the board, I heavily starched my back before rebasting- my first attempt at quilting it resulted in puckers everywhere. Flannel needs the starch! I did not use basting spray with this project - I used a method also suggested by a someone on this board. Look for Sharon Schamber's quilt basting video on Youtube. It might look a bit odd but it worked great for me, and my second attempt at quilting this flannel is going great! Good luck with your flannel project!