Fredy,

It seems to be enough. I can knife edge loop with no problems.

I think there is a lot of overkill out there, and the reason I say that, is that years ago before all these high powered servos were available, guys were flying heavier airplanes with smaller servos. In fact about 7-8 years ago, I had a 40% Giles, that had one Futaba giant scale servo on the rudder, rated as 220 oz (or somewhere around there) and I had no problems. I also just had 2 JR 4721's, nylon gears, 120 oz each on each aileron, and it would roll till you were blue in the face.

Sam