Oh experiment too ,heel to toe on the lead foot and shuffle up the rear at times. Other times on toes with heels simultanousley lifting and lowerring creates openings and avoidance in head movment too.The trick is linking them all up into movments that are pre thought out techniques.Swithing feet as you go under the opponents arm and then spinning the rear foot around the back of the lead foot is another great opening creator and a massive leverage move for a bomb shot or outside hook over the arm etc as they adjust to follow you.(that is safe to switch there as your away from his other rear arm and moving further away as you do it so you only have one arm to deal with and thats the one you went under.This is made for short stocky blokes who can get in low around larger mens elbow points disrupting them forcing them to always want more space.