As mentioned in an earlier log, the gimbals use Hall Effect sensors. Below shows the magnet with the sensor PCB removed.
The gimbal in the photo below has one sensor PCB in place and the other sensor PCB removed.
The small button is on a flat flex cable. The cable connects to the USB board. The above photo has arrows pointing to the two connectors which are normally mated when assembled.
Below is the left gimbal with the flax flex cable show at the bottom of the photo. The small switch is not in view in this photo.
The small button and white plastic friction liner have been removed from the left joystick in the photo below. The two small buttons are circled.
Below is a rubber light shroud to isolate the LED on the PDB with the USB connection.
Above shows the USB PCB rotated 180 degrees. The charge state LEDs and two buttons are on the other side of the PCB. This PCB has connector to accept the flat flex cables with the small switches.
To be continued.