One day out of the blue, the pitch didn't respond well.

I did dozens of calibration.
Slowly move stick up, and release. Stick returns to center and reads about 0 +-1. (90% time)
Slowly move stick left, and release. same.


But, sweep left and up to the corner, and slowly release, it shows pitch -12, sometimes even -20.
No fingers on sticks, and its pitched -20. If you make small movements, it will continue to "center" at -20.

When it gets into this bad state, you can feel stick is in dimple center. You push very slowly up, and it climbs back to 0, and now it maxes out at like 81. Aggressively moving stick to bottom or bottom right, fixes it, but during flight thats not always an option.

So what have I tried:
1. tighten all the screws holding gimbal.
2. loosen all the screws holding gimbal.
3. add/reduce tension on the centering spring
4. re-solder the little cables going to hall sensor.
5. clean the surface of the magnets and sensors

Might be imagination, but when the pitch hall sensor board was not screwed down tight, it felt half better.
6. reflow solder of the tiny capacitors and the hall transistor.
7. REMOVE the tiny capacitors.
8. 


Nothing has completely fixed the problem.
It feels like NOISE in the system, like there is extra charge/magnetic field the sensor is stuck reading.

This guy seems to have same issue.
https://www.reddit.com/r/multicopterbuil...ht_how_to/

I ended up replacing the right gimbal.

Fixed it.
Problem free for 6month+.

But now it is doing something similar. getting stuck +3.5. Maybe wires caught on something.

Are the gimbal wires Silicon or PVC?

Various TX makes have over the years had issues, especially in colder conditions, with the PVC stiffening and either affecting the sensor position or breaking strands inside the cable, affecting connectivity.

Thats an interesting point.

Back then I even tried removing the tiny SMD capacitors because it fixed issues for somebody else.

I think its too much time wasted. Next gimbal will be CNC AG01