Military smoker theme build

My first smoker build will be a military theme smoker. I will be using an old steel military missle container as the smoke cabinet. I will build the fire box out of 1/4 steel plate, the frame will be 2x3 steel. I have a 50 cal ammo box I will be adding on for storage of utensils, paper towels, seasoning and so on. Any and all advice/ideas would be very helpful. I will post pics as the build goes along.