I have 2 silly questions about using Minky for backing. I am using 2&1/2" cotton squares (can't believe I am doing this) for the front and I want to use Minky for the backing. I am not using a batting. Does it need to be quilted, there will be no batting to bunch up? Should I use a little bigger seam (3/8th maybe) to prevent any seams from fraying, without batting and quilting I worry about the seams raveling more and having more stress on them. I want the quilt to be washable and well loved. It will be a lap quilt about 50" x 60" or a little larger (depending on how much fabric I have).