Looks like its Lance Wagner is selling this particular one and its from Custom Amsteel Products creation.
I wanted to be clear, the posted picture and add are not mine.
Understand what your saying and appreciate your concern. Ive been using this system (taking it out of concept and putting it into practice), as have the saddle manufacturers (Phantom bridge and others). The key is to be smart, understand that friction, while being one of our best allies, is also our worse enemy. Assuming your concern is related to burn through, melting points and such, you have to realize that the configuration DOES lock and hold. Now, its more of a fixed prussik, not to be use with a prussik tender, ropeman, kong, or anything that is intended to make a prussik adjustable. Thats introducing potential to loosen and release. While most prussiks are better suited for this, they can all fail when heat and shock are introduced.
If your concern is that amsteel is not intended as a life saving device, well, neither is half the crap we choose to use to hang our happy arses in trees, or the equipment we use to get there.
I dont trust the manufacturers any more, or less, than I do most of the folks here. I appreciate that they are putting in their homework, but I choose to put in my own.
With that said, if you dont trust it, by all means dont use it. I could not agree more.
Love ya brother, nothing pointed towards you, love what you do and share. Just countering this particular point of view.