I agree grooveitgolf. Not to beat a dead horse but I noticed the same thing from the medicus infomercial, the different break points with the dual hinge are the same break points with the single hinge. Believe me I know because when I first started swinging the refiner I had a swing flaw just about everywhere and the refiner would let me know at each phase of the swing. Anyway, as I said before, they are both good products and I always carry my refiner with me whether at the range or on the golf course. The hinge concept is really what's in question and it is definitely valid.