Rkos....Looks like a very respectable pizza. Have you tried using a preferment or a starter? Either one will make a big difference over straight yeast. I also like to use some kind of stone ground whole grains like rye or wheat. I make my starter with rye flour and it is really active so I don't have to use yeast.
Do you have a mixer or did you knead the dough by hand?
The hole in the bottom of my Weber is 11 1/2" and I've never had the foil melt. I think the flames from the burner were making contact with the foil just above it causing the melt down. I hope you were wearing shoes!
I use a mixer with 8 cups of flour at a time, no oil and approx. 4 tablespoons of sugar with some salt. The minimum is ususally a 24 hour rise in the refrigerator. - I use an instant fast rise yeast purchased in the typical 3 pack at the supermarket - not a lot of sophistication in the dough making process at our house, but I get solid, reliable results every time with this recipe and it only takes me about 15 minutes total to make and bag 4 individual bags for the refrigerator. The aluminum droplets on the concrete were not from the foil but rather the light aluminum pan which came with the fibrament stone for cooking on a gas grill.
After the grill cooled off I was cleaning it and found an approximate 7" circular hole burned through the underpan.
The fibrament factory fellow I recently talked with said the aluminum pan which came with the stone was good to 1200*F - the LBE must have gotten hotter than that under the stone or his calculations are off. The good news is the small hairline crack in the stone did not expand any more.
I going to look for a heavier aluminum or light steel pan to put the stone in for the baking process when the LBG is used.
BTW - the pizza was SUPER - the bottom picture was blurred, but it was a beautiful brown, with a slight char, just the way we like them at our place. Had I used a timer and not lifted the top of the LBE off 4 or 5 times during the baking process I'm confident the top would have been a little darker as well.
I'll try again at lunch tommorrow