The 9001 servo is an excellent servo. I have a pair on the elev. of a 14 lb. gasser. 150 flight no problems. Those should be good for ail. & elev. I would however go with something a bit stronger on the rudder.

As a point of interest I had a Goldberg Ultimate with 2 - S148 standard servos on the ail. After 10 years and 1100 flights they were still in there working fine.