Eric,
Has anyone tried replacing the cables in the pull pull with carbon fiber rods as used in the elevator set-up? Seems like we don't want any thing that works like a spring in our control system. We need to get the natural frequency of the mechanical system up higher than that of the servo. I'm using two solid pushrods on the rudder of my 2.6M Extra (to two servos) and there is no sign of oscillation and there is zero slop. Just a thought. I bought 8411s for my Impact but haven't decided how I'm going to install it.
Jim O