Thanks Chris,
That tracks with the designer notes you uploaded on the previous Nuance thread. I downloaded and re-read it. It is located here:
http://rcone.kr/board/index.html?id=bjreference1&no=14
Folks need to download and open the "Nuance170-explanator.zip". It is easier to follow than the text version uploaded previously.
Basically, he designed it to favor a slight aft CG. He has some very interesting insight into the design features. The file is definitely worth reading. Lots of thought went into the design.
I'll go with the aft rudder servo.