Ken,

Have you seen that you can use the AUX-CHAN function to assign any switch to the flap receiver outputs, outputs 5,6,7 and 8. So you can assign the 3 position switch C to say, flap outputs 5 and 7. Then you get three flap positions on switch C and can apply other functions to adjust the amount of movement although I don't think you can adjust the effect of the switch middle position; it will probably have to be half the total movement. However you could assign VR instead of switch C to the two flap outputs and have a completely adjustable flap position.

Angelotti.