I used 4 servos in the wings and used the standard ones that came with the radio. For the tail I used FMA coreless servos.
These have a transition time of .10 and around 70 some torque
ounces, they are also metal gears and have ball bearings.
I hooked them up with pull-pull cables on the rudder and the elevator. It has performed with no troubles and has unlimited performance.
You could use 2 servos in the wings and connect the upper aileron with rods. I'm not sure about the ultimate but the pitts was
tested both ways with no problems.
Electropiep