Hey Chris....
Sorry to hear about your fake WindTunnel. I recently bought a great Hoover Tempo Widepath upright and it does indeed have the patented WindTunnel channels in the agitator cavity. It really DOES make a difference in dirt pick up!
Just FYI.....You have the story about Eureka backwards. In the 1970's, Electrolux of Sweden bought The Eureka Company, and at the time acquired the right to put the Eureka name on their vacs, not the other way around. Since the 1970's, the company has sold many vacs branded with the Eureka name, but actually made in Europe by Electrolux, or Volta, or Progress or any one of their many vacuum subsidiaries.
Brian