Thanks for asking the question Jester! And if I may, now on to some other questions I have that have been bugging me for several days:

1. How many servos are there and are they digital or analog?
2. Was the TX checked to be sure that all trim mods were removed?
3. Was any check made to insure that there are no mechanical limits to travel?
4. Are we really working on elevator(s) or ailerons?
5. Have the servos been checked for equal travel on either side of center?
6. How does a DX9 deal with multiple servos for a single function?

Question 6. is posed because my TX (Futaba 6XAs) has different throws for different channels (If not modified in software). In this radio CH 1-4 are only good for ~40 deg on either side of center, while 5 + 6 are good tor ~55 deg plus or minus.

I'm fully on board with RBacons. The mechanical setup needs to be "dead bang on" without any electronic intervention. The trims are there for just that, TRIM, after the bird is in the air. 70 years of dealing with life has taught me not to use up "wiggle room" to soon.