This latest version of the 7TM binding has an increased spring rate to make the binding more "active" and powerful, in fact 7tm are quoting a 25% increase in "power". The former version 7tm was a very neutral binding which was updated with the introduction of the power pin (which moved the pivot point back under the foot). These new ones take another step but still have the removable pin if you wish to make them more neutral feeling. As the telemark world becomes more and more focussed on NTN if you prefer 75mm then these bindings offer excellent, "tuneable" performance.
