Jim
Thanks for the clarification. I may have used the wrong example (Ailerons) in my first post. I follow the logic in your reply. Going to have to read up on plane reaction to adverse yaw. the 1030 130 example clarified.
For differential travel: If you are using a single central aileron servo, and you set your pushrod connections at the 3:00 and 9:00 position on the servo wheel, you should get equal travel up and down. If you set the pushrod connections at 10:30 and 1:30, you will get almost all up and almost no down.
If you were setting up flaps with individual servos on each wing half, do you see any advantage in positioning the servo arms closer to the 10:30 (port) and 1:30 (strb) positions? I'm thinking of a limited (3-8 degrees) of UP FLAP position as a possible trim assist. This would be set to a VR switch would be active , unless some other mix switch involving the Flaps (E to F, or A to F couple) were activated.
dickeybird: Still digesting your info....