I always use the birthing method on the baby quilts when I use 1" poly batting. I lay my backing fabric face down, spray the backing with 505 basting spray, then layer the batting over the backing. Let it dry for an hour then pin the right side of the backing fabric to the right side of the quilt top & stitch all around the perimeter, leaving an opening for turning the quilt. Turn the quilt right side out, stitch the opening closed. Then I pin like crazy or use long hand sewn basting stitches (about 4" apart) to keep the top from moving while quilting. I do not have a problem using this method. The baby quilts I make are 45" x 60".