I liked the hit ec programmer option also. just make sure the control horn and pushrod geometry is as close to identical to get best results. I have had them on the same surface and when they were programmed they matched perfectly no fighting. you can even match a programmable servo to one that is not programmable just make sure you program the hitech servo to the regular servos true end points and center max endpoint setting on radio and no subtrim on centering. make sure mechanically everything is close then the trim will move both servos to the same points. you also have to balance the servo speed to be close to the regular servo. close counts.