Have noticed some of the quilts posted use pieced backings in one manner or another. I usually tape my backing to the floor, lay batting on top then my pieced top. If I choose to do some decorative piecing on the back, how to I know how to align the top with the backing so that the backing is "squared" and not lopsided since the backing is hidden when you cover it with the batting which is 4" larger than the pieced top? :( :shock: :?: