Nice post SZ. Nothing is carved in stone relative to Mother Earth production. It is our knowledge & consistency that makes all this work There are & always will be variables--a bottom of the bin delivery is going to have smaller w/ more fines. The biggest reason I went with a hand fired is because she'll burn it all--sometimes more ash sometimes hotter burn, sometimes not. So much leans toward the common sense platform, I personally love it-- gives me a break from the EXACT, DIGITAL, DIDACTIC crap that people have gotten so lazy behind--sure, I get pissed when things don't quite meet up to my expectations, but it is what it is and I tend to just roll with it & do my best with the knowledge I've acquired over the years. I'm as much talkin about life in general, not just burnin coal.