While doing research on various designs for charcoal retorts both on IFI and elsewhere, I ran across this interesting variation that I wanted to get folks' thoughts on. It's an indirect-method retort, but rather than a double-barrel design with the fire around the outside, it appears to be essentially a 55 gal drum with a rocket stove in the middle, fueled by the wood gasses being piped back in through the fresh air intake. Has anyone here ever seen/tried/used/built anything like this, and would