Michael, as always, your information and insight is invaluable, no kidding.
Last night, after a couple hours of t&e, I stumbled on the "magic" of the "offset" for the center number, and have purchased a programmer that will have the v. 1.04, so that problem should be solved.

Re the "parallel" servo arm to hinge line.... dealing with pattern birds for years PROVED to me that if they are NOT, you will have ASYMMETRIC travel due to the rotational nature of the arm moving off center. Let's say "left" aileron is FORWARD of hinge line, and "right" is AFT of hinge line. At the first movement off center, asymmetric control deflection will occur, because "mechanical" differential caused by the difference in the radii of movement, and in fact, the travel will remain asymmetrical.

Set one up with the arm parallel, and the other NOT, and measure the deflection in BOTH directions. I guarantee a significant measurable difference between the two will be present. It is a "mechanical" anomaly that the programmer cannot fix.