The problem with the stock setup of the Excelleron is that it places the pivot point too far aft, and THAT results in the non-pulling cable actually increasing it's tension as the PULLING cable approaches it's max deflection. THIS produces assymetric tension on elevator halves, and believe me, guys IT IS A PROBLEM.

What it creates is assymetric elevator travels near their limits as we set them up, and that produces corkscrewing. Hard pulls like square corners, or pushes, like we have in the Vertical Square Eight DOES CREATE troubles.

What I've been searching for, and solved, with the help of others, I might add, is the "neutral" Ackerman, and that is with the control takeoff exactly over the hinge line.

I'll update with better photos after I re-string the elevator pull-pulls.