RE: which requires more servo torque...
Good point, Ed. On my UCD 3D 60 size, I went with a pull-pull on the rudder. Made a HUGE difference in hover and knife edge. It's just a standard, but the pull-pull really works wonders. I guess the question is still open. One could make the arguement that, for instance; in a hover, the elevator has to work harder because of the pendulum effect. Ie, it has to keep that heavy nose from going astray. But, the same could be said for the rudder, it's just doing the same thing side to side instead of fore and aft.
Beats the heck out of me...just go fly! [8D]