The whoopie attachment they provide only fits a very limited diameter of tree. I’d imagine a truckers hitch type of attachment mod could work well for them. The whole aider concept definitely ain’t for me, I tried it briefly and my foot slipped off the tree right when I was pushing up on the aider. I ended up doing a wild Chuck Norris kick around the tree before I caught my self. I really don’t like any aider at all.You know that’s a great question. I just picked up some of the premium cranford folding rope steps. I always thought they were kind of a joke and didn’t work well and the ropes were flimsy and they just weren’t something that I felt was worthwhile as a practical matter. I’ll have to say though, my assumptions were way off base. So far I’m pretty impressed with them. I picked up two four packs. From a cost benefit analysis they cost me a $100 with the ropes that work like a daisy chain or a chinese finger trap and they actually are very easy to climb with and once set, very sturdy and quiet on the tree. I’ve been watching some videos on using these with climb rsted daisy chain webbing straps to use as an aider or a five step etreir’ with a biner hooked over the step as you advance. Super packable lightweight “high speed low drag” system for those times you just don’t want to have a lot of volume of stuff. With a ROS or a pursuit platform, worse case scenario you’re out < $200. Anyway, check them out: