Ahoy, hoy! I will be building a smoker from a 275 Gallon Oil Tank and am looking for some suggestions. First of all, What is the best method for cleaning out said tank? Secondly, Fire Box or Direct Heat with removable fire 'drawer?' I am picking up the tank next weekend, but I hope to have it up and running by Labor Day if all goes right. Thanks, and any help or suggestions are welcome!