does anyone know what temp the ebt opens and closes.i have a insert so i cant see mine.i read that the free standing ones you can watch it.if so has anyone watched it.and when they say char the wood before turning the air down.does that mean so the woods glowing red or just black?also when you turn the air down for a long burn do you turn it down so most of the flames are coming from the top air baffle?its surprising how much of a learning curve is to burning in one of theses things .but im loving it.