If you really want to set up a pull,pull system right you should us a bellcrank in the middle. Use short push rods to the bellcrank and then from the bellcrank to the control horns. By using this method you can make the pull wires as tight as you want and take the stress of the servo bearings. I suggest that you use ball links from the servo to the bell crank for positive movemnt and no slop whatsoever in the transition of force. But thats just my opinion. Ken....The "BALSA BANDIT"