dikemiya, beatiful oven and tile work. About you being unlucky, I said something similar in my build thread as 2 of my floor tiles from FB have long hairline cracks with just curing. They are sending me new tiles which is great. But the extra time and having them switched out is a PITA. FB is great for the customer service but if you are going with FB, it sounds like you can expect more issues than other manfacturers.
John, you fireboard seems strong and beefy! What brand is that? Are you sourcing it separately from the oven or is it all packaged together.