You might try a tool on the Fons & Porter website that is specifically made for binding. It's a little acrylic ruler that shows you exactly what length to cut the binding and exactly where to sew the two pieces together. I have used it twice now and the binding comes out perfect. I also like to do the binding - I machine sew it on the front and then hand sew to the back. Since it is the final step in my quilt (besides the label), I really enjoy it!