I was wondering if someone could give me a brief rundown on the difference between the two types of runners. I understand the quality of the steel is different and I understand what impact that had. What I am more interested in the impact it has on actual skating. I see that the LS4 has and extra 3mm of height to the blades, and that changes the turning radius from 9ft to 10ft. But what doe that turning radius really mean. Is it a case of sacrificing speed for tighter turning or something like t