I'm not certain why you would want one other than to roast a whole pig cheaply. They used briquettes but they were on top of the box, basically it was just an oven. Wooden box lined in sheet metal with grate on top for the charcoal, it would not provide much flavor to the meat. It's baking/roasting. No smoking. Thats a lot of space to heat, underneath a fire (heat rises) to do 4 butts like he did. He had to keep adding coal hourly he said, at least it was easy since it was exposed on top where most of the heat was lost. Its the anti-egg, the exact opposite.