ORIGINAL: Bax
Ideally, you use mechanical adjustments to put the control surface as close as possible to the trimmed position when the main trims are centered, and only then use the subtrims to take out any amount smaller than the mechanical adjusment can do. This keeps you from having large amounts of subtrim.
In other words,,,--- NO. Too bad, I really liked this feature on my old Super 7, and was really dissapointed when I found my 9C wouldn't. I'm living through another problem with my 9C now- I can get the plane trimmed out, land it and shut everything off, and when I turn the trans back on all trims are back in the middle. Quite disconcerting!