Sounds like the JRo may have missed that adjustment.
Pizzas look great, Jeff. I made dough this weekend and fired about 10 pies with the rest of the family for Father's Day. It's been quite a while since I've made dough, my technique needs some work again. Overall I was happy with the performance of the oven.
As far as adjusting the stone height, I initially adjusted the collar as Jeff mentioned, but seemed like it wouldn't go as high as I wanted. First the little piece of square shaft that connects the motor and the carousel wasn't long enough, and then when I lengthened that, the platform didn't seem as stable if you raised it up out of the lower guide hole. I could get it where I wanted by lowering the platform back down and putting something under the stone.
I was happy with the top/bottom heat balance, just need better dough. I have a new batch of starters, some 00 flour, and a Bosch mixer on their way...
Can't wait to see what Chau comes up with now.