BSO, in response to your question to jconk, I would guess they are 350 or 400. I find with these trays that 350 is about maximum for me, and they can to grow into one another after a long fermentation. This can result in the square look that keste ends up with sometimes. BTW john the pizzas look super nice. One question though, did the dough cith the oven while still slightly cold? Wondering about the bubbles. -marc