I've used his method several times and one time I did a variation that turned out to be amazing...once I had the diagonal cut, I inserted a 12 inch strip of coordinating fabric (you can make it as wide as you want, but 12 to 15 inches is a dynamic look), then stitched on the other diagonal...the final look was really great - very dynamic and makes a backing that can work as a front as well. Just remember to offset the second triangle like John Flynn does in his video.