by the way...thanks for the link,,,I like it.
All the hardware on my boat is Wichard except blocks and winches
So I assume that "increasing the setting" is equivalent to putting more wraps around a line snubber? Because that's what this is, a sort of snubber.
I have a similar mid-boom set-up I made myself (no shock absorber, though), in that I have two purchases to either toe rail, and they give me enough mechanical advantage to pay out one side while hauling in another.
This is lighter and less complex in that it is just a single long line wrapped on auxiliary winches.
I bet it's cheaper than the typical Boom Brake. Interesting stuff!