The thing he was pioneering was putting out systematic approaches to leg locks to the general public. There were instructionals, but most of them were just collections of techniques without positional strategy and advancement. The only only ones really in that category were Ryan Halls 50/50 dvd and Scott Sonnon's weirdo ramblings. Dean lister was winning, but didn't put out a systematic DVD until much later. Even Sambo Steve's first leg lock instructional kind of sucked.