Probably only got a little weed-wacker tank because I didn't notice anything extra. That's got to be heavy, but they are only holding it for like 10 seconds. Gravity pulls it through the logs and the guys just collapse when it breaks through the other side. It does look kinda small. It might not even have any of the "required" components cause it only runs for short bursts (cooling system, etc...). Still, pretty incredible.