I don't like torque-rod driven ailerons. They are so long and narrow that they tend to not deflect as much at the far ends. If you can push them down easily with your fingers then the wind can do the same thing.

I'm not trying to scare you as they work fine and I've used them many times. I just would rather have a more positive setup. Since this is the first time you're doing this, I agree with the above advice. Mount the servos in the middle of the wing just because it's easier.

But a better way to do it is to mount the servos outboard a bit to make the whole thing more positive. I'm just splitting hairs here.