I think it would be a great product. Some people will like it so they can taxi back in with a twin float plane. If you could keep the rudder function on at high speed you could do some interesting spins. One of the fliers at my club used a product called an engine sync 2000, I think. He said it was much superior to the EMS/Jomar product and the way he described it work as yours is intended. Apparently it has been out of production for several years. Keep the price under $100 and make it reliable easy to use and set up and you should sell quite a few with all the KMP and VQ P-38, B-25s that are going around. I have two p-38 kits and a p-61 to build.