sawdust burning

came across the sawdust burners. those are pretty cool in their own right. then i found this video. its a rocket stove run on sawdust. thought i would share it and ask for your thoughts.



so what do you experienced burners think of this?

That reminded me of this - (the music is annoying )



If I had a ready supply of sawdust, I'd build one with interchangeable inner barrels.