Quick vid: Strange FrSky QX7 fault (maybe fixed, maybe not)

Ron's FrSky QX7 developed a very odd fault on Sunday. The aileron channel was very slow to react to the stick movement.
This smelt like a faulty potentiometer in the stick unit or a high-resistance connection between the pot wiper terminal and the logic board. I swapped the wiper connections between the aileron and elevator channels to see if the fault was on the pot-side or the logic-board side -- and the fault disappeared.
It may have been oxide on the connector creating a high-resistance insulating layer -- or it may just be coincidence.
We'll keep an eye on it and if the fault re-surfaces, I'll do a "fix it Friday" video showing the way I attempt to locate the true cause of the problem.