This is my 1st UDS. I mostly followed the tips in this thread, but added a different fire basket, and cut the barrel in to. A stainless bowl sits on the fire basket for a water pan.
I flanged the cut line on the top half, so it now sits on the bottom. That way i can lift off the food, and easily access the fire, without lifting the water pan too (a la WSM).
Not seen, i added a rain cap to the flue after the first burn, which also chokes down the airflow. 2" is way too big.
I've fired it up twice. It works amazing. The 1-1/2" threads on the bottom are for a future Stoker fan adapter. I also added a couple of 3/4" nipples so i can use it easier without the stoker fan. It's a little hard to throttle with a 1-1/2" inlet valve.