Thanks for the quick analysis!
cannot find any compass data
That seems odd, what could be the reason for that? Is it possible that the compasses were not working at all?
There is also no battery data.
I did not set up the battery monitor yet, so that's ok. Will do that before the next flight.
With the ESC's so close to the PH2.1 it's internal compass's are probably very untrustworthy.
You should do a motor/compass calibration?
Thanks for pointing that out! I believed that due to the cube (with the compasses) being on top of the mounting plate, it's far enough from the ESCs. Seems like I was wrong. I like the placement of the ESCs though because it reduces the mess on the top plate. Would a motor/compass calibration help or should I just rely on the external compass on the M8N? I also considered adding another M8N for GPS redundancy, that way I'd have a second external compass.
Motors 1 & 2 are working hard while 3 & 4 are not???
Are the motors level?
That's the CoG issue that I suspected. I added a gimbal in front and shifted the battery further back. In this flight, I was using a 6Ah battery instead of a 10Ah one. Thus, I suppose the battery weight was not able to outbalance the gimbal weight.
Vibrations look good
That's great. Seems like the PH2 IMU isolation does a good job.
Thanks a lot for your input!