Cut the batting in thirds, and remove the outer 2 pieces. Roll up the backing and top on both sides to quilt the middle. Quilt to within a couple inches of the edge of the batting, then lay out and sew the batting back in on one side, quilt, and then the other side. This removes most of the bulk but keeps the backing and top in one piece. It woks really good. I cut mine in curves and put a sticky note on each piece to indicate which side it goes on and it fits back together perfectly, then I just whip stitch the two edges together with big stitches.