Very cool. One thing I forgot to mention (probably particularly necessary if like me you have a sub-optimally shaped pit), is that a hose can be used to spot slow the burn in areas that are becoming too ashy if it is too small of an area to place more fuel on top (without melting your face). So I would spray a jet of water if ash appears at one side, until the rest of the surface catches up and I can throw a whole load more on top. Good luck with your experimentation!