Alright guys, I have finally got around to start testing my stepps.
My first impression: Don't even think about trying them with an aider until you are comfortable with tying the knot and getting the stepps rock solid. I took a couple out in the woods with me to tinker with my first time using them. I put one on the tree, hooked up the aider and quickly decided I was going to kill myself if I tried using it. Fast forward a few days later and I played with the stepps for about an hour in my backyard and got much more comfortable with them.
I watched the original Jim Stepp instructional video on you tube and it was really helpful. Going back and re-reading this thread, Andrews following statement is the most important thing I have found. You really need to get the rope tight, start to cam it, most likely it won't, then back the rope out just a hair and it should cam over.
The key to getting the stepp as tight as possible is to bring the stand offs (the sharp ends) above the lateral line of the rope and pull as much slack out of the rope as possible, then push a little slack out of the rope and cam it over.
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The next time I tinkered with them I used 4 stepps and the aider very successfully in the backyard. Tonight I went out in 95 degree weather and climbed 2 trees. The first tree I got to 20 foot with about 7 stepps. The second tree I got to 20 foot with about 6 stepps. This is where I am going to have to keep practicing. The aider worked great and I had no problems with it. I need to keep practicing and find the sweet spots to space to stepps to make the most effective climb. I would end up getting larger or smaller gaps between them so I just need more practice.
Using the aider going down, I just ran it along the side of the step and eased my way down. I could not feed it back through the middle every time.
I really want to make this system work so I'm going to keep at it. I love how much more compact it is than sticks. It is probably a pound or 2 lighter for the same height. Right now it probably takes me a little longer to climb with them, but I'm already getting much quicker with them so I expect that to continue to improve.
I am going to continue to practice with them as they are, but at some point I may try them out with some amsteel. The current rope is pretty bulky.
@SteppsbyWildEdgeInc, that is the biggest advantage I see of amsteel, it is much more compact. There may be other options out there as well.
They do not make much noise when camming over but if you bang two together taking them out they will clank.