I just finished one, piecing the back with the left-over fabrics from the quilt top, my first time to do this. But, I recently joined a quilt club with very accomplished quilters (not me), but they had done this on several quilts that they brought for "show and tell." I'm sure they don't do this with quilts that are to be judged. But some of them are very cute the way they arrange the leftovers. Lots of creativity in that club!!