Hadley worked Tysons corner at the Tyson-Lewis fight. He has a web site at www.hadleysboxing.com you might write him and ask for information. Herb M is correct that Tyson did modify his stance. I was at the Tyson-Lewis fight and Tyson was by that time, a shell of what he had once been. D'Amato also took Floyd Patterson to the championship but I can't say for sure where or when he picked up on teaching Peek A Boo.