[ATannahill]

This might help you.

If you have a large air tank off the robot and use the robot compressor to fill it the morning of the competition, you could then use air from this tank to pre-fill your onboard tanks before each match. This would still meet the requirement that all air comes from the one compressor and allow you to hit a higher psi before starting your compressor to finish filling the tanks.

I do not believe there is a rule stating that air cannot be temporarily stored off the robot.