This is a front view showing the linkage between the vertical post and the horizontal post. Not really horizontal, but for purpose of discussion I'll refer to it this way. The standard model ProClimb uses only the horizontal portion with the handle bar mounted directly at the end of the extended shaft, similar to the Ski Doo design.
This image shows both the horizontal and vertical shafts removed. The adjustable vertical shaft is substantial in weight. I'm thinking that I might pay a visit to Zbros and discuss the possibility of building a shorter non adjustable shaft in the interest of weight reduction. This will better conform to the discipline of back country mountain riding, Rasmussen Style!