Well... not sure I would use the words "beauty" and "simplicity" to describe it, but its basically a set of spring loaded pins with small wooden handles. They are contained in the fence itself on each end, held there with cotter pin and washer. You squeeze the handles pulling the pins to the center of the fence, thus out of the indexed holes, then lower or raise the fence to the desired height and unsqueeze, the springs pop the pins back into the holes at that height and you're good to go for another slice. The catch is to remember to do this when the RipSaw is at the opposite end of the fence, as moving the fence up and down with a 50lb mill at that end can be done, but not easily. Also, for those wondering how I get the ripsaw on and off the fence, one of the ends folds down away from the base, which lets you do that when setting up.
I am actually in the process of take #2 with that thing... this next version will improve upon the this one is several ways. It will be more precise, allowing 1/8" indexing instead of only 1/4, because I want it to double as a kindof resaw bandsaw. I have lots of rough lumber that I cut 6/4 and 8/4 years ago, and would like to be able to resaw those in half to make 1/2 and 3/4 lumber. So I'm going to make another one of these, but longer to accommodate an 8ft board, and redesign the sliding dogs lower so I can resaw a board leaving as little as 1/2 inch under the Ripsaw blade. Got too much on my plate at the moment though, so this won't happen till Fall probably.
I'd be happy to share my plans with anybody interested.