Holy airtanks!! It might be a little late now but you can get a 1 gallon metal tank that should hold all of your air that weighs less than all of those tanks combined, and looks cooler
Sweet climber though, you guys do that quick!! If you really want to save air you could invest in spring extension cylinders that only use air on the way in and a spring going out, we thought about it until our 30 pt climber got scrapped.