Both have their advantages. The biggest reason to pick one over the other is for CG reasons. The fact that you stated a 3 servo pull pull setup leads me to think we are dealing with a 40% bird. Be careful as most 40% airplanes can't tollerate alot of weight in the tail. Most have 2 servos per elevator so adding another 2 back there can create an issue. I would build up the airplane leaving the rudder servo install for last and do a CG check then work from there.


As far as performance, IMO it's a wash. Pull Pull done correctly has great response and is a little more forgiving in setup and is lighter. Even in a 40% airplane two servos @ 300 oz is plenty, no need to go with three. Putting them in the tail should give better power to the rudder however it is near impossible to get them 100% in sync. The result with that is lost power and then even more lost power through the 4 feet of wire. Not to mention that wire is going to put another 3 oz of weight aft of the CG. As you can see I suggest you stick with Pull Pull unless you are coming out nose heavy.