It is set up for two aileron servos, which are sufficient. If you intend, as you say, to fly it "hard", then I would go a step above standard servos; on ALL surfaces.

Mine has Futaba 9252 digitals on elevator and aileron; not because I think the strength is needed, but because I have come to prefer the precision of digitals.

There is a picture of mine, along with a few modifications I did that I believe are necessary, on another thread here someplace. I'll try to find it...

.