RE: Heli servos for pattern (stab)?
Depends entirely on the servo. I tried some of the very fast JR 8717 heli servos on ailerons once and really didn't like them. They are outstanding heli cyclic servos, I use them in several models, but I felt they were a little nervous for a pattern model. So unless someone has some experience with the servo you are thinking of, you're sort of taking a gamble.