You know how almost every building instruction has the advice to have 90degree angles from your servo horns to the pushrods. And to have a 90degree angles from the pushrods to the horns on the surfaces, and that 90degrees going straight through the hinge lines.

There is a reason for all three of those suggestions.

Any divergence from 90degrees in all those places winds up creating differential movement at the control surfaces.

It's not something people are trying to figure out, it's figured out. And proven. And easily measured. OK, not so easily measured. But there ain't no doubt about it. Except from people who haven't understood it yet.