I am in the middle of a quilt for my ds and i am trying to make it the way he wants it. The top is blue denim with white stars and am putting white sashing around each block. The backing is dallas cowboy material and he wants it to be one piece with no sewing (or quilting) so that the full dallas cowboy designs shows on the back. The front he doesnt care if I quilt how can i do that and not quilt the backing?