Sorry to butt in on this one, but the futher your control rod is from the servo final gear the greater the the throw. Reluctantantly you diminish the torque aswell. I am using 645 ao AL. and 5645 on EL. I am going with the 9330 on rudder. Yes I know I am mixing digital with standard, but they are not JR which is the only brand I have ever had any problems with mixing digital and standared servos.