[MrForbes]

If you look at the wiring diagram for the joysticks suggested in the IFI documentation, you'll see that they show that the 100k pots are only connected to signal and +5V, and not to ground. Last year we connected all the pots on to the OI using 3 wires each: ground, signal, and +5v, and everything worked fine. This makes the pot into a voltage divider, and the signal voltage is proportional to how far the pot is moved towards the +5V end.

You might want to ask IFI is this is an acceptable way to wire up a pot to the OI before you try it.

We wired up that Futaba controller to the 2007 robot OI this way and it works fine.