Does anyone have one of the magnetized thermometers on their stove? It doesn't take much for me to get it in the "over fire" range. It says up to 300 is creosote, 300-600 is good, and above 600 is over fire. With a good bed of coals and new wood loaded, say up to 5 hours after putting them in, it hovers around the 700-750 mark. How hot is to hot? The thermometer is located on the slanted plate between the lower level and upper level of the stove. Thanks