Now that is thinking outside the box. I became a left leg above knee amputee 4 years ago, and I came up with something very similar. I was using it as a hand control. Here is a video of my setup. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-15Nnv4BlQdI.html