Richard,

Are the cables rubbing the fuselage anywhere in side. I converted my Aresti 40 to pull pull and had to end up crossing my cables to prevent any binding/rubbing. To ensure they didn't rub at the point where they crossed each other, I used ball links on the servo horn and installed one on top and the other one on the bottom of the horn. With proper tension, I have about 1/4" clearance between my two cable where they cross. I have had no problems with my setup and the rudder returns to nuetral every time it is deflected in either direction. Hope this helps.

Good luck and happy flying.