OK, hows this. I've looked at most of the animated props here and about, and all have 2 things in common. Either they are motor driven or air driven. Many of the props I like are air driven cylinders. Now as we do have an air tank available, I could only buy a hundred feet or so of hose, etc. But has anyone done any research into alternate air supplies? One of my other hobbies is paintball and I have a ready supply of Co2. One 20 oz tank holds appx 180 scf of co2 at 15psi. Has anyone done any displays/props using this as an air source? Thoughts or concerns?