After over a year in the design and contemplation, I finally bit the bullet and started construction of my WFO. Based on Davenport's designs from TurtleRockHeat, I scaled it to fit my operation. William was busy at the time with larger projects, but gave some insight on my rendition of his work. Working hearth is 46" x 60" with 19" vault. Wall thickness is 9" minimum of Firebrick. I started the project Aug4,2012 and hope to have it baking bread by Thanksgiving.