I don't have any experience with CO2 but are those tanks gonna be big enough. I mean, it may take a lot of them and they might get expensive. I don't know if a standard regulator will work on those tanks either. If you have good exhaust you probably won't have any real need for CO2 anyway.
the small ones aren't worth it.. too expensive and you need a rig to release it... I tried using the clip to an air hand gun.. works but it's a pain in the ass..
the bigger bottles 15/20lb would work fine.. and that's exactly what i'm on the hunt for.. my friends use to paint ball alot..
you don;t have to rock out hte room to 1500 all the time.. anything helps..
at lowes they sell little foot long bottles filled for 30 bucsk I think to power air equipment. They found out that co2 is like 1000 more times efficient than air for tools and cleaner too for bike tires! They are in the same Isle as 16 dollar regulators. Try craigs list but dont look in the farm and garden, look in the entire for sale section. Farm and garden are all overpriced for pot heads. I got my 20 lb tank already filled for 40 bucsk with a regulator too!