Does anyone know if you can power a webcaster with a CO2 supply? I don't have a compressor but would still like to use a webcaster and this seems like if it works it would be the cheaper alternative.
No idea. However, could you borrow/rent a compressor? Are there any shops with friendly return policies that you could buy one from, use it and then return for a refund?? Not ideal, but plenty do it.
I own a webcaster and also have played paintball since the CO2 days. I can tell you that it won't work without some real engineering work. Keep in mind that under pressure CO2 becomes a liquid, and when it goes through a phase change it rapidly expands and rapidly cools everything it touches. CO2 would literally freeze the end of your glue gun in about a second and completely undo the whole point of shooting strands of liquid glue. You could probably shoot a small bb sized pellet of glue a long distance though....
We have two web spinning devices, one is web-caster gun which requires the air compressor. We also have the Webmaster 2000; it requires a good quality cordless drill or an electric drill (if you don't mind hauling the cord around) . The Webmaster is more portable with the cordless drill, which I really like. I think they both do a good job.