In reply to MacKnee:
Good old Wildsnow. Just had a look there and lo and behold there was a comment posted within hours of my first query by someone who has used them:
"Regarding the Ambition 12, we had been on Fritche for years, then made the switch to Dynafit Radical over the past couple years. However, when we got on the Ambition 12, the combination of the binding which is significantly lighter than Fritche when mounted on the Fischer Hannibal ski gave us a set up that was lighter than our previous set up, Folsom Custom ATX and Dynafit Radical. So we have the total convenience of a full on step in binding with security of DIN 12, and reliability all the way around on par with standard bindings. Other benefits are that the Ambition has a super high climbing peg which adds to the convenience. After a couple years on Dynafit, that benefit alone more than made up for the difference in weight. While the Ambition is lighter than the Fritche, it is obviously not as light as a tech binding. We weigh in at around 180 pounds and especially on hard snow and ice, the Ambition 12 is a pure AT binding that easily accommodates side country and even in bounds skiing if needed. It’s very versatile. We will take them to the Himalaya this winter without hesitation. It’s not something that you would race on, but for other AT skiing, it’s a proven product that is light, durable, and very convenient. I personally have never been completely sold on tech bindings in general for a variety of reasons, and the Ambition 12 is a super and very pleasant addition to what’s available these days."
And then, when the Marker Kingpin proves its durability, I can get some of those