[RyanN]

First of all, the Spike Relay module does not control the air flow. It would be a pneumatic solenoid that controls air flow. Second, we don't get any type of solenoids that would allow you to change the rate of air flow.

Probably the best way I can think of doing this is to put a servo on one of the hand operated release valves. Even then, I'm not sure if the servo will be powerful enough to turn the valve. You may want to use a globe motor plus a potentiometer to turn the valve.

I'm not sure of the FIRST rules on this as you are using KOP parts to do this, and as long as you don't alter the valve, I think it would be legal, but don't quote me on this.

Remember, you are still required to have a manual release valve.

As for how to control direction, put the "custom" valve on the inlet of the solenoid, then control direction using the solenoid.

Hopefully this all makes sense, and if needed, I can try to draw a picture of what I have in mind.