Chad, if you are this far along on your wing, then I doubt you can install torque rods without tearing it apart again. Those usually go on before the trailing edge--early on in the build. What happened to the ones that came with the kit? A bell crank system is WAY beyond your skills. Not to be harsh, but if you can't figure some of this easy stuff out, then don't even worry about a bell crank setup. But, FYI, a bell crank utilizes a single servo in the middle, with control rods running horizontally towards each wingtip. At a given point in the wing, those torque rods fit into another control horn (a bell crank), which redirects the force out toward the trailing edge of the wing. The bell crank then has another control rod hooked to it that goes out to the control horn on the aileron. Anyway, there is no way you can install this setup now--your wing is already sheeted. Your best bet is to go with two ailerons. You are going to have to bite the bullet and do this now. You made a decision early on in the build to do it, and now you are basically stuck with it. Dual ailerons are not difficult. However, if you have already sheeted the wing fully, and have no way to run servo wire through the wing, then you may have some work ahead of you.