The only point of my post was to challenge the necessity for such lofty requirements for torque and speed. 150 ounces for rudder is a minimum for a similar sized 3D plane, but about twice what you need for pattern. But that's my opinion, I could be wrong.

The World Champ, CPLR, after all is using a high speed but low in torque servo for rudder as stated above. I am using 80 oz/in and it's plenty. With the higher torque and higher speed servos the centering will be better than the average standard servo. Definitely go with a coreless dual BB servo... high torque is not a necessity in pattern at all, but it won't hurt you either. The goal is a smooooooth servo that always comes back to neutral.