It looks like the heel lift (for climbing) on the Naxo is somewhat short, true?
The climbing heel lift/latch all randonnee bindings are judged by is that of the Fritischi models — a 4-position lift, with super-high final position. I compared the Naxo (has 3 positions) to the Fritschi Diamir. The max height of the Naxo is about 1 centimeter lower than the Fritschi (tested with 29 cm boot sole, medium size binding). If you are a super aggressive backcountry uphiller, no doubt the higher lift of the Diamir, along with one extra choice in lift height, may be helpful. On the other hand, folks who favor the Naxo say the double pivot compensates for the lower heel lift, and they say the Naxo thus has enough lift. In my experience, I found the Naxo lift height to be fine for most tours, but did occasionally wish for a bit more height. (Interestingly, the Naxo lift is higher than the Diamir in the 2nd position (one above flat on the ski.) A fun homebrew mod would be to make a small height increasing adapter for the Naxo heel lift. Please let me know of any efforts in this
