The pulley system, to me seems to be a bit of false benefit.

let me explain with the power of pictures!



As I see it, having a set up the same as JAS's (which is the way I do it) seems the most logical. to fixed points on the rudder and the servo arm. As the arm travels the lengths stay the same right?

With a pulley, they don't, calculating the distances between the horns mathematically, the long side would need to GROW to keep the tension on the lines the same, so essentially what i think occurs is the tension on the cables is balanced, but the OVERALL tension increases, which I'm not so sure is a good thing.

Anyway, some food for thought.