Joe,
If you look at the various
configuration file downloads from Van's download area for the G3X Touch RV12/12iS, you will note that the autopilot configuration files are separate from the base configuration.
You can just download and install the autopilot configuration (and not the base configuration) and it should not affect your configuration outside of the autopilot configuration.
Note that you can save your existing G3X Touch configuration to an SD card before loading this new configuration in case you have a reason to restore the previous configuration.
Here are some of the settings in the Rev. 3 autopilot configuration:
Roll Servo
Max Torque: 100%
Roll Servo Gain: 0.70
Roll Servo Fine Adjust Amount: 0 (disabled)
Pitch Servo
Max Torque: 100%
Pitch Servo Gain: 1.30
Fine Adjust Amount: 1
Fine Adjust Time: 0.2
Vertical Speed Gain: 1.0
Vertical Accel Gain: 1.0
Airspeed Gain: 1.0
Airspeed Accel Gain: 1.0
Airspeed Track Gain: 1.0
Steve