[MrBasse]

I generally try to stay as far away from programming as I can, but I'm fairly sure that the code is already present and you just have to wire the pressure switch properly for it to work.

For just shifting gears, do you really want the compressor on the robot? Seems a few storage tanks and an offboard compressor would get the job done there. Unless you plan on shifting a lot of times just to hear the cool noises it makes...