Steve, on mine, I am using two HiTec thin wing servos for ailerons, one for each wing panel, so I don't have the rigging issue.

For my Proctor Jenny, I hope my explanation is clear . The way it works is that there is one servo in the fuselage with "joining" cables coming out each side of the fuselage about 3 inches with a turnbuckle on each end so the wings can be disconnected from the fuse. The cable is located about mid-way between the upper and lower fuselage longerons, and just runs through a hole in the covering at that point. Another cable attaches to the other end of that turnbuckle and runs straight to just outboard of the front outer spar where it attaches to the upper wing, then it feeds thru a miniature pulley, then back (chordwise) to the lower aileron horn where it is secured. A cable on the upper wing side of that same (double-sided) aileron horn runs forward (chordwise) to a point just above the lower pulley, feeds through the upper pulley that is secured there, straight down the wing to a point somewhat above the middle of the wing where it ends in a turnbuckle so it can be disconnected above the top wing. Cable then continues towards the opposite wing, same way thru a pulley and back to the upper side of that wing's aileron horn. On the lower side of that aileron horn, another cable runs underneath the wing, forward to a pulley located same as other wing, then straight to the turnbuckle on the opposite side of the fuselage where the opposite cable comes out from the aileron servo. A lot of words to discuss what is really a simple solution when you see it, but essentially, it is a closed system with 4 pulleys, two on top and two on bottom of the wing panels located about where the forward strut attaches to the upper wing, but outboard about one rib location. Tightening up the turnbuckles gives a pretty tight system without much slop, but needs to be a "little" loose so it doesn't bind up at the end of the servo excursions. This may be hard to follow, and if it isn't clear, let me know and I'll take a couple of photos that should clear it up.

The Proctor Jenny probably used this system to be true to scale, but I think it may be prone to problems. Now you can see why I am using two servos for mine.

I got sidetracked and haven't finished covering the fuselage on mine. Should be done this week, then I can add rigging. If you need a rigging diagram, let me know, as I saved my sketches from the Proctor and plan to duplicate that on this model.

Lee