Is there any way to make a simple, moveable shock absorber for climbing?
I'm trying to put a multi-purpose platform about 90 feet up a very large tree. The first 25 feet or so from the ground is completely devoid of branches, so I threw a rope around some branches higher and then prusiked up it. However, the throwing-the-rope-up-and-prusiking method will be ineffective higher up, as the dense braches would stop a rope thrown from getting anywhere. So I was thinking that I'd do a via ferrata type system, where I had multiple slings attached to my harness and would attach them progressively to branches as I climbed, so that I could clip in, climb a few feet, clip in again, unclip the previous sling, and repeat this. However, a short fall onto normal webbing or rope would cause serious injury. I looked at buying a via ferrata kit, but the only ones I can find are one-time tear versions. I really don't want to have to pay ~ 100 USD every time I fall, so I was wondering if anyone knew how to make a simple, reusable energy absorber, preferably from webbing, carabiners, etc. (i.e. the kind of stuff the average climber has lying around). Thanks!