hello....Next year my school is planning on doing Les Mis for the musical...therefore i am going to have to try to come up with some fog. Right now I am leaning on building 2 machines out of metal trash cans. I figure i need to make the lid sit on top more snuggly than normal but then build in escape valves so pressure doesnt build up. My question is on whether or not i need a fan unit inside it to make the fog come out better or but one on the end of tubing or what.... I guess i want the fog to be able to shoot out kinda quickly to fill that stage. Ideas??