If you fold your backing over to make the binding, after trimming the batt to be the same size as the top, cut the backing at least 1/4 inch wider than you need. Fold the backing over at the correct place and tuck the excess under the batt. That way, when you flip the binding to the front, there will be a double layer of fabric over the edge. You may need to undo a few quilting stitches to do that but that will be covered when the binding is flipped to the front.
The problem most people have with using the back for the binding is that they say there is now only one layer at the edge. Doing it this way solves that problem.