This does sound very interesting but how do you manage when it's raining and leaves twigs etc are all wet?
I have always managed to find something to burn, you might look under hedges, the dry side of walls etc. If the weather is dry but looks likely to turn wet then you can just store some dry fuel to get the fire started then put the wet stuff on, it can get a bit smokey but it will usually burn.
You need to keep a small pile of fuel to keep adding as the fire burns lower - you soon get the knack of cooking this way.
A down side is you end up with slightly blackened pans.
As well as the twigs etc I will pick any wood up in the grass verges when I am getting near my campsite and just chop it up upon arrival.
I actually cooked on one of these home made stoves at home for a week before I used it "for real" on the road, it is nice to know that if you had a power cut you can still cook something at home.
Sorry - I seem to have gone off "meths" topic