I found out many in my guild did not know the trick of using very light weight fusible on the back of the completed quilt top before adding the batting and backing. It keeps the quilt top smooth and all the seams going just where you wanted them. I use Misty Fuse. It's so soft and thin you can't tell it's added. I fuse a lot of my blocks before sewing. I didn't know it was a new technique.