Thanks onequick! You are providing a lot of good information. I think it will be tough to get major players to use the shafts on an unendorsed basis because of the conflict with their other endorsement deals.
Unrelated note, I went to Golf Galaxy yesterday. Once again, none of the salesmen knew about e21, which is disappointing. The salesman pulled up the website and was interested, but mentioned how Liquidmetal thought that they were the next material in golf and they folded, then pulled one of their drivers out of the used bin and it was listed for 59.99.
I also tried out the Sumo Square and it was strange addressing the ball with the square head. It performed well, but it sounded terrible. It sounded like you were hitting a hollow piece of wood, and didn't feel that great. They didn't have the FT-i, yet so I couldn't compare.