Question: Why are two pots unused ?.
No more computers to connect. (5 in total)
Question: What is the function of the solenoid and does that lock
the stick at any point (zero ?) in it's travel ?.
The solenoid is activated by the A/P and add's a force threshold in neutral stick to prevent any unwanted switching to manual control, while keeping
the possibility to override the A/P if required.
simple schematic of xdcrs: