leggie grip isnt too complex, hold the ball between the last joints of each of the first three fingers, with the thumb and little finger holding the ball in the grip. At delivery, the palm of your hand should point away from you, toward the umpire, if you will. you turn the ball by kinda flicking your ring (third) finger straight, with a little tweak of your wrist for good measure.
for topspinner and wrongun, you just change the direction your palm points at delivery.
richie says: practice your stock leg break 90% of the time and your variations the rest. its the strength of your leg break that will get you the wickets.