Pitch tuning for change in CG

Hi Guys,

I have a plane that is tuned nicely and flying very well. Last weekend I did a endurance test and changed the battery for a much larger one. This shifted the CG forward a bit. On Auto takeoff I noticed that the plane wanted to pitch down a little but then flew off and did the next 48 minutes without a hitch until Auto Land.

Looking at the Logs later, I noticed that Nav Pitch and Pitch are now off by -+10 degrees. (See picture attached)
How can I change this without retuning the plane?
Could I trim the plane up a few clicks and then redo a radio calibration?
Would changing the AHRS_Trim parameter do anything?
I often change the payload of my plane, and experiment with different batteries and would therefore not like to re tune and trim my plane every time.
Thank you
Regards
Andreas

Andreas,

The PTCH2SRV_I gain can be used to drive the aircraft pitch to the nav pitch. There is a tuning procedure in the manual.