Hi GBL

I read the manual many times.
Some of the things in there I do not satisfactorily understand.

I am going back to search specifically for recommendations as you mentioned.
A few days ago the heading hold was operating normally.
Since yesterday it is not anymore. The heading wants to change constantly.
I do not know that I did anything to change that behavior.

I am looking for making it normal again but do not know how to do it .
Never a dull moment. Something has changed ... I do not know what ... or where to start looking.

I certainly cannot try to fly it when the heading has a strong force of yaw rotation.
It looks like the heading gyro is doing the opposite of what it used to do.

I will be looking and checking if the tail servo has been changed (normal or reverse) and other stuff. Got to do some figurations.

Thanks for your recommendation.

Zor