Never seen a none sashing instructions. But I just sew the top as you would then lay flat on a table with batting on top. I cut batting so it butts up to each other and hand stitch them together. They are now lying flat I smooth across one side of the backing and then smooth across other side and then fold it back to make a lovely neat straight seam and hand stitch and press. If you need to finish a quilt design over the seam quilt now far easier than when all done.