Is it possible? Could i cut a round peice of aluminum and stick magnets into it to resemble a spur gear? I am trying to make a 4:1 gear ratio but eliminate friction, i was thinking if i could custom fit magnets in the aluminum wheel (since magnets are not atrracted to aluminum). I would have both the bigger gear and smaller gear with the repel side. I was hoping i could make my own rather then going thru a big name company like magnomatics. Also would there be problems with the magnets spinning at high rpm? Around 40-50,000, the smaller gear would basically be free spinning so i dont see very much torque being apllied to any of the gears. Any suggestions?