I never said your method was wrong I said that I disagree based on my experience. That rig is long gone. The whole thing was put together as a club meeting presentation because so many new (and some old members) were having set up troubles thanks to the new computer radios. The common theme was over relying on the computer radios with sub-trim, end point adjustment, and expo to overcome improper mechanical setups on sport fliers with baseline sport servos on sport aircraft.
The system I use has served me well so I stick with it.
Your 20 years reference brought a smile to my face when I think about back when;
You needed to order reverse rotation servos (or reverse them yourself) because TX servo reversing did not exist.
You sawed the wing of a new pattern model in half to change the dihedral to tune out unwanted coupling because there was no TX mixing.
You removed the servos to clean the pots before a pattern meet to ensure the best response from control inputs.