Oh, another thing. In my stove I am not only going to use esbit cubes , but some BBQ coals as well. I think they burn longer and more effiecintly. The two fuels can work side by side. One starts the other, and the other stays longer.
It will be interesting to see if the combination of heat insulation ( means higher temp ) plus the added heat from coals will burn the esbit soot and residue to smoke !!