I'll hold integy comment's to myself.
Best thing to do is measure the distance between the servo saver hole and knuckle hole, measure how far the actually turnbuckle screw's in the ball end and also the length of the rod end.(center of the ball to the deepest point of the screwed in turnbuckle) Now multiply the last number by 2 and substract that figure with the length between the servo saver hole and knuckle hole. That's the length of the turnbuckle you will need w/ any rod end you measured.
Very hard to explain in english, hope you understand me.