[QUOTE]Originally posted by Steve Campbell
[B]The way to avoid assymetrical slack in a closed-loop system is to ensure that the control linkage is a perfect parallelogram; IOW, the distance between the connectiing points on the servo wheel/tiller bar/whatever are the same distance apart (from center) as the connecting points on the control surface horns; and the cables or pushrods are exactly the same length."

This is exactly correct and the only way to make the system work properly.:thumbup: