thank for your response, working on some concepts 3 to1 gear ratio's. Current commercial products are over priced. Magnadrive, Magnet Power Transmission, Magna Force are a few that are other there. I want to gear a wind turbine and are wondering if I can use this same tech. using rotor discs as gearing. The concept of gears that don't touch, vibrate, or need fluids intrigues me.