As mentioned be sure to use good quality flannel yardage.There is an abundance of 'cheap flannel' on the market for lesser price and it is literally junk. Moda and Benartex are good. I like to wash mine twice before cutting it. I usually use hot water, detergent and the dryer for the first wash. Then I wash with warm, dry until most of the moisture is gone but damp enough to iron without hard wrinkles. I use regular seam allowances and little shorter stitch length. It does make a heavy quilt-so be prepared when you are ready to quilt-lots of support around your machine.