Back to Back Patchwork. I lifted this picture from way back in 2006. From the beginning when I was working on Listen to the River. I am using that method here. I have some videos somewhere, but let's just say patchwork on both sides, wrong sides facing each other. It is a handy way to "block" one side with another. Use the math to line things up. On this old piece I just tied through the meeting points until quilting.