I just took a class with David Taylor and he shared how he keeps his quilts flat and stable while machine quilting and hand embroidery. He uses polyester 1/2 inch twill tape, irons it open, and sews it on the front of the quilt using a 1/4 inch seam. He sews it in the "ditch" of the tape, ultimately making it 1/4 inch when you fold it up even with the edge. Then he does his quilting on the machine, then binds the quilt the regular way. He said he got it at Walmart because that's his option where he lives.