Just courious about what you guys have built or bought in the way of special effects cannons. The last musical we did was Beauty and the Beast. At the end of "Be Our Guest" our director wanted a shot of confetti over the audience. So I built this beast... http://img.photobucket.com/albums/v654/fiestakid88/DSC00597.jpg It's a 7 gallon tank with a 2 inch nipple welded into it. And before you go all over me about this not being safe because I ruind the integrity of it...I tested this before it was used in a show and there is a guage on it. On the end of the nipple was a 2 inch ball valve and then a barrel. It worked out pretty nice, now I use it for launching golf balls into my neighbors field. For the musical I rented a 20 pound tank of CO2, but now I use my air compressor here at home. I fill it through the original fill that was in the tank.