I was getting ready to say the same thing but you said it just fine. We dont really need a stove thats like 1% better in efficiency. There are stoves in Europe that burn at higher efficiencies than US designed stoves. We need to get into the upper 80's low 90's efficiency , heck this is the year 2013. You ought to see what we do with diesel engines these days as I work in research and development for a diesel engine company. Alot of secret sauce in those diesel engines.