Starting to think pretty seriously about getting the stuff to start making one. I got a question about the valves. I notice most UDS have 3-4 holes in the bottom, one with the ball valve and other three capped off. My assumption is that for real low temp smokes keep the caps on and use the ball valve only. Then remove caps to increase temps? Everything open would achieve the hottest smokes. Also, just did a craigslist search and found this http://corvallis.craigslist.org/for/1599425306.html almost tempting to get 2 or 3 for that price. I just talked to the owner and he said the barrels were used for corn oil.