How long preheat js....wonder what that stone temp was. Have you had the dome hotter?
I think the preheat was like a half hour once the lump charcoal starting heating. I didn't put the heat deflector on until I was ready to put the pizza on.
I need to check my thermometer, been awhile since I checked to see if it's set correct. That was the hottest I have gotten the dome. Also the Emile Henry stones seems to heat quicker than my other stones.
I may buy a Infrared Thermometer.