Tradheli Users,
I want to draw your attention to the tradheli changes listed in the Copter 4.2.0 release
Details of these changes are described briefly in this forum post and provide links to the wiki as applicable.
The heli setup page in Mission planner has been updated with the new parameters but is only available in the beta version. Still waiting for QGroundControl heli page to be updated. You can always use the full parameter list to see all of the parameters which you will definitely have to do to change the Autotune parameters.