[WizenedEE]

That code will only be called once, since it's in the constructor. Assuming you construct everything in your main robot's constructor, that code will only get called once, and the robot will be disabled (so calling customTankDrive will have no effect).

Have you thought about using another method of output (like printf or smartdashboard) than your robot itself? If it prints out "Button A pressed" when you press button A, you have some valuable debugging info.