Rock,
Very good reply. Lots of info one can digest and understand.
Yes, I understand if you are flying a large plane or one with large
control surfaces you need more servos.

Essentially the question is if I convert a single aileron servo wing
to a two servo wing do I gain anything?
I wasn't very clear on that in my first post - for a reason.
From what I have picked up here - none to very little gain.
Maybe a slight more positive action from pushing in the middle of the aileron
rather than the end.
Thanks for the replies,
KW_Counter