I'm about to start building my Ultimate soon. I was going to modify the build using two servos in the wing, however, I will use two Futaba S-301s. That gives me a direct slop free linkage (I don't really like the torque rod setup from past experience), reduced weight compared to 1 standard servo, more torque per aileron and faster response. The only downside is buying two slightly more expensive servoes and the added modification to the wing.

-tychoc