Don't over-engineer things. Controlling two ailerons with one servo is done all the time; just look around and you'll see quite a few examples. I've posted the most common way below.

For the "torque rods", the rods attached to the ailerons, you'll have to drill a hole into the leading edge of the aileron, then put a 90 degree bend in the rod. Epoxy the short leg into the hole in the aileron.

Dennis-