I'm a mechanic and the place I work has 2 tanks from old propane units that have been sitting to the side for a while now, I was thinking they would make a decent smoker. I'm currently using a oklahoma joe so these tanks are almost the same size just a bit skinnier and tad longer. I'm gonna ask the main boss Monday if I can snag them to try and make a smoker. I have decent welding experience but I guess I'm asking do you think the size of the tanks are worth it or should I try to find bigger?