Everyone should be reminded the fairings especially on the 320 as it comes from the factory is likely to be at different waterlines (WL).  From a previous note:

“The fuselage fairing positions before “adjustment” are a bit rough. By that I mean the fairings are not at an equal level condition (WL) with respect to each other from the factory … at least mine weren’t. You must make them equal in waterline position by “adjusting” the fairings during construction (heatgun and urging). Otherwise, one WILL be at a higher (or lower) WL than the other. One of mine was >1/4” higher than the other. I adjusted one of them and don’t know if the reflex is correct or not. So we’ll either suffer the indignity of having flaps that do not match with the fairings, your reflex will not be perfect, you’ll fly with offset (un-faired) aileron to fly with out roll, or you’ll split the flaps and your ailerons will look funny. Or a combination of some of these.”

 

The point is if you measure these fairings and find them of different waterlines, your reflex will be different from flap to flap if each flap aligns with its inbd fairing. So if you’re now flying, adjusting the fairing levels are hardly possible and adjusting the reflex in flight is the answer to best performance and that is the goal (unless you are vain like the rest of us).

 

Jim