I have been trying to get MPO into neo baking temperature since I joined this forum and shared my experience along the way on this forum.
Here's what made the difference in my last tests:
1- Centering MPO over 3 burners instead of 2 and using the 2 outer burners. This configuration allowed even heat between top and bottom stone. MPO reached 650 Deg F in this setup without any insulation.
2- on another test, I inserted an aluminum foil in the slot above MPO top stone. To keep the foil from sagging and touching the stone and keeping an air gap between, I used a piece of metal mesh and covered it with aluminum foil with shiny part facing the stone to reflect more radiation back to the stone. In with this setup, with only the two outer burners, MPO reached a balanced 725 deg f with.
3- Last night test, I covered MPO loosely with aluminum foil, made sure there is air gap under the foil cover. First used only the two outer burners, I felt it needed more heat, so I turned the middle burner on low. MPO was over 800f in 30 minutes.
I am planning to do a bake test this weekend using all purpose flour, I don't have any caputo flour. Based on the temperature reading of the top and bottom stones, I should have very balanced bake. Top and bottom stone temperatures were very close.
If successful, MPO is the only oven that can bake any type of pizza and most bread.