Quick help for a gear changing pneumatics system.

[arun4444]

So if I were to put on these ball shifters:

http://www.vexrobotics.com/ball-shifter.html

They use the two following cylinders to change gears
http://www.vexrobotics.com/vexpro/ge.../217-2778.html

What would be the minimal pneumatics circuit I would need?

I think that a compressor is not needed, would need some tubing a solenoid? and what else?

I would greatly appreciate if someone could draw out the simplest circuit required - I am totally new to pneumatics and was thinking what would be required to swap out our gearbox which this one - there is no other pneumatics on the robot.