This is very interesting, but I am the recipient of quilted blocks (machine quilted) that have all three layers the same size! There is no overage in the backing material to stitch together, then fold over and stitch. I have seen some instructions on adding narrow strips to the front and back of the blocks, then sewing another block to the front, open it, add a strip of batting and then fold over the backing strip to the second block and hand stitch/whip the edge closed. Does anyone have a better way of doing this? Thanks, mariesto