override trim in configurator? No, its definitely not that.
The most important thing for the HPG Helis and TelemFFB is that your stick properly centers when hands off. If it is not within "hands off deadzone" percent of center, the helicopter will think you are "hands on". The entire AFCS emulation is predicated on knowing when the user is deflecting the stick from the current center point and the only way we can do that is by axis position since we don't have "force" sensing.