Sharla had the Patent a few years, but nobody qiute understood the theory. Then it got tested at the Uni and the penny dropped it was one of lifes moments when three Proffessors looked at each other gobsmacked and said, do you realise what this means. Me replying Ive been trying to tell you the last three years. Eventually there will be four different machines, exciting times ahead. Working the muscular foundation without impact and levers joints,naturally not constant, touch and feel as Ive said before are under estimated in Biomechanics.