When I first tried this method, I misunderstood what red was doing. I had thought that he was placing one step at chest level and the tether as high as he could reach, then stepping up onto that single step and repeating. Doing that method, you can indeed get a lot higher than the Wild edge aider method. Testing in my backyard, I was able to set a step at nose height (5'6"), lift my aider foot as high as it would stretch, and just be able to step into that step. Theoretically I could climb to 22' with four steps that way - just using the tether and webbing loop for the aider.
The issue is that it's not as stable because your handhold is primarily the tree, so it's a higher risk of kickout. So I re-read this thread and saw that indeed, guys were using this similar to the Wild edge system where two steps are placed on the tree before climbing up. It's just that the aider is on the tree vs the step. Makes sense. More stable. Easily adjustable. Top step gets placed at max height (8' for me). Bottom step at 4'. Same spacing as the Cain method too.
But I was thinking, when I climb with sticks, I don't usually hook my lineman's belt on until I'm standing on top of the first stick. For me personally, the fall risk is low and so is the hazard, relatively speaking, vs falling from higher up. With the redsquirrel aider method, you could really max it out on the first step, placing it at nose height or even higher, then switch to standard spacing. It would be an easy way to gain an extra 1.5-2 feet off the ground.
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