HERE IS A VIDEO OF THE SHAFT DRIVE THAT SUPPORTS THE PROPELLER.  WE WENT TO A LOCAL MACHINE SHOP FOR A LITTLE ADVICE BECAUSE WE REALLY WANTED THE PROPELLER TO SPIN WHEN THE WIND CATCHES IT.  THIS CAMPAIGN HAS BEEN A HUGE HIT WITH OUR CLIENT.  WE BUILT 5 OF THESE PROPELLERS TO GO ON DIFFERENT LOCATIONS IN OUR MARKET.