Bill, Alan - Thanks to BOTH of you.... there's some good stuff coming out of this, and helping me understand things a little better.

I guess the FIRST dilemma/question is - How do I *KNOW* the servo arms at NEUTRAL are 90* to the chordline of the stabilizer/elevators? (I understand that having them 90 relative to the servo case is meaningless) ??

Assuming that finding that, mechanically, is pretty important, AND that it's done with the least amount of subtrim possible?