Tonight I did a little 'engineering' on the airleron servo idea:
The servo hole is already in the rib, the rest of the drawing is schematic but accurate. As you can see, this movement would allow for an up-swing of 63 degrees, and down-swing of 40 degrees. Servo arm is 25mm (about an inch) and so is the distance from the hing point to the linkage. With a little end-point setting on the TX or with digital servos, I'd be in business, right?
Cheers,
Hugo