I have been test firing the double chamber cob oven for baking bread. The wood stove cob (a home building material that has buildings lasting over 700 years) "pizza" oven has turned into an entire outdoor kitchen with 2 rocket stoves, and grill. While functional, I know they can be better working. Tweaking with the cob oven for more efficiency has begun in earnest with research being done tonight based on the original video below as an example.
What I saw I need to work on is widening the opening and making a second door as well as upgrading the current. I also need to make a device to move burning wood and coals from the first chamber into the back oven.