I need some advice to help aide temperature control in my smoker. I built my smoker out of plywood and 2 by 4's then covered the interior with aluminum foil. Right now, i use a mini weber grill at the bottom as a heat source however it loses heat fast and everytime that i need to add wood/coals, i have to open the door which becomes a real pain. I am thinking that i should build a firebox next to it and just have an exhaust pipe pumping smoke inside but would like to hear some other ideas.