Everyone likes different things ... if it were me, I'd build a UDS on casters with a clay heat sink, side door to reload the charcoal tray (oven gasketed of course), adjustable rack settings, Guru air inlet, insulate the barrel in 2" of clay and cover that with sheet metal. Add a Tel-Tru directly under the lowest rack adjustment and use a Maverick for the upper rack. And come up with another idea or two as I build away - maybe run a pellet hopper off it.