I am glad I checked this out because ou can mess up a rag quilt i had to throw 2 of mine away because they knotted up but I used quilt batting. So I am going to try the flannel in the middle instead of on the back. Oh before anyody says anything I did put the X on it before I sewed them all toghther the only thing I can think of is that when sewing them toghther the batting was a bit smaller than the outside square. It was hard to sew them on my machine. I used fleece material on the back and cotton on the front. So I will try thr flannel in the middle.