I have been using pull-pull on most of my models, 1/4 scale on down to the smallest electrical powered and find it to be far superior to other methods. There are two things that you must do to have it successful. One; never have any negative Akerman, a bit of positive Akerman is desirable; and Two; do not over tighten the lines, just enough tension to have no slack at neutral. That bit of slack (with positive Akerman) as the surface moves off neutral is not at all detrimental, in fact desirable as it prevents any overloading of the servo.