i just aquired a bowjon windmill to pump from a shallow well ,ground water is at 9 ft below the surface.iam using (2) 5 ft dim. concrete pipes, 8 ft. long standing on top of each other to form my well.iam using a pump that works much like a bicycle tire pump that operates on air. the bowjon windmill is missing some parts. the tail kicks over to the side and stays there. i know nothing of this device. and would like some assistance and guidence in making this windmill run again.thanks