I don't understand...Way before the current idea that the only way to fight a southpaw is with the straight right, even before the 'step to your left and hook' school of Al Bernstein, you fought a southpaw by taking the inside position and using your left hand. Jack Hurley taught it that way years ago. A.J. Leibling told about it in his classic boxing novel "The Professional" (based on Hurley and Billy Petrolle). That is the only way I have ever taught it and, God knows, I only stole other people's ideas.