Had an idea about charcoal. When I was in china, there was a lot of coal salesmen wandering around with buckets full of charcoal on a yoke. These coal bricks where round and maybe 5-10 cms in diameter, wouldn't they fit perfectly in the little dish that goes inside the stove? People seemed to use these coal bricks extensively. Weird country btw, I loved it. Of course lighitng the coal dish would be a bit troublesome, but maybe with the help of meth or green heat? Ooops, now I got an even brighter idea, why not load the little fuel dish with shisha/hookah coal (usually found in arabian food shops)? Some varieties of that stuff has some kind of coating that makes it easy to light and burn evenly, they burn for a long time and really hot, with little smoke. Maybe not a practical solution in the long run, but fun to experiment with.