New BGE owner here, Large size. My wife and I tried cooking four pizzas for the first time the other night, and got burnt crusts on all four.
We had the plate setter legs down, and the three BGE feet on the plate setter. The pizza stone was then set on the three feet. It is a 16" pizza stone from Old Stone Oven, brand new.
I had the BGE at 650 for about 10-15 mins before we started cooking.
The first pizza was on for about 4 mins. The bottom of the crust was OK, but the outside edges got a bit burnt, presumably by flames coming up around the edge of the stone. But the top was NOT done. Some unmelted cheese on it.
The second pizza got a burnt bottom in 3 minutes. Mind you, it didn’t actually taste bad – the layer of char was extremely thin, and you could barely taste it. But people were put off by the appearance. The top was cooked OK.
The third pizza got a burnt bottom in 2 mins. The top was OK. Again, it didn’t taste bad, just looked bad.
The fourth pizza was burnt in 1 minute!! :S Despite the fact that I had lowered the temp of the egg to 500 by this point. The top was not fully cooked either.