This is probably too late but if this just involves one piece of fabric for the top and one for the back and the batting I would have done the birthing technique that Eleanor Burns has shown. With the top fabric face down on top of the batting and the backing--that is face up and sewn all around leaving a hole to turn. Then turn and topstitch around the edge to close the opening and using a walking foot or even an open toed foot to stitch top to bottom and even side to side or --possibly even tying the quilt.