Heres something more from the A-pac board. When it shows up in the game controllers menu, it is two separate gamepads. That means you have 4 axis available. Up/down and left/right. On each side of the board. Gamepad 1 and gamepad 2.
So after some consultation on what type of "pot" to use, (Radio shack $3.95) I hooked one of the axis up to the gamepad 2, left/right side. No real wiring skills necesary. The A-pac came with the capacitor and there is picture on their site on how to wire it. Simple. It works perfect.
You can imagine the possibilities. Your own rudder pedals, collective or joystick. Let your imagination be your guide. My purpose at the moment is for a trim wheel(elevator trim) for the fixed wing sims. Also, for flying the big heavies in MSFS, they use a small wheel in the cockpit to turn the plane while on the ground instead of rudder pedals.
These extra axis will work perfect for those things. And in EECH, a homebuilt collective is in order. Just take some plywood and some PVC, and .........
So, if choosing a USB board, I think one with joystick axis is a for sure.