I agree. I did just watch a DIY propane thrower, pretty cool. He used a BBQ propane tank, but he had two smaller cylinders that I would use. He did not say how long his tank lasted. With apx 55lbs of pressure it shot out around 10" to 12" then further with running the engine. You can leave it shooting until it's out of gas. His muffler tips are tinted blue, which I wouldn't leave mine on to stain my stainless pipes blue.