Stanzel had a couple of pre-monoline systems which I have never paid enough attention to to understand. The terms G-Line and Thumb-It come to mind. These are on exhibit and explained in exhibits at the museum, and I think units may still be available. These were attempts to compete with the Jim Walker system which at the time was patented. I've done a couple of Learn to Fly Control Line events with the Stanzel Museum. I've always felt a little odd about teaching the Jim Walker system under the aegis of Stanzel, but I haven't let that stop me.
