Inventor of the "closed eye conjecture"
I still think you are missing what I am saying about the inertia of the rod be useful. When I am up against the bushes and my sweep is constrained, I often end up only being able to managed a fairly shallow d-loop, which means I have less load from the line than I would like. By flexing the rod butt against the blanks own predisposition to stay put (inertia) I have more energy to unload against the line. I don't get this out of rods that don't easily flex under their own weight.