Just another thought. I just finished wiring up my F-15, using a JR Matchbox, rather than the Y-connector on the nosegear/rudders.

Really works neat since you can individually reverse a servo, adjust ATV, and set center, all with the Matchbox, which is very tiny. Any gyro command goes out to both servos, or an individual servo, depending on whether you hook the gyro upstream or downstream of the Matchbox.

I now have just one lead coming out of the Matchbox going to the rudder channel on the 950S, and two leads coming into it, one from the nosegear servo and one from the rudder servos which are Y'd together, although you can control up to 4 servos on one channel, so you could hook up each rudder servo individually on a twin rudder airplane. I now use only one channel and no mixes.

It has a very fine adjustment capability (it adjusts in 1 msec pulse width increments) so you can easily dial in exact centering and travel.
It also gives you the option of hooking in a separate battery supply to those servos controlled by the matchbox, thereby taking the load off the receiver/battery. Not as important in jets as in giant scale where one of my planes has 4-8411's on the rudder and 4 on the split-elevator

Tom