Steven,
That's what I'm doing too. I can't remember exactly how many hinges I'm using on the ailerons, but I used the aileron itself to determine the position and number. I'm installing one at each end plus one everywhere the aileron has a web from leading to trailing edge. I added a small block of scrap 1/4" balsa to the inside of the wing trailing edge at each of these locations, then marked both the wing and aileron with this location. We don't want to have to cut open the covering on the bottom of the wing just to find our blocks now do we?

I'm going to do the same with the tail surfaces except the webs in the fixed surfaces already line up with the webs in the movable surfaces so I won't add any reinforcement.

John