1) Editor
2) Load MAB
3) Spawn a T11 Zero G Probe Drill
4) Assume control of the vehicle
5) Use mouse to switch your Secondary Controls to Robotic Arm - Right
6) Observe that the Arm doesn't react to Arrow Up/Down
7) Use mouse to switch your Secondary Controls to Robotic Arm - Right
8) The Arm now reacts to both Primary and Secondary Controls