knudson and bertholy

hi peter,another question if i may.does bertholy talk about stance width at all?i was doing the step in drill{which i had done years ago,hitting some very solid shots,but didnt understand why} and i noticed when i planted my front foot farther out in front the swing felt more balanced and powerful.i couldnt hit balls though because i was swinging indoors.wide stance,hmmm.