oasiscdm found the way to do this "off the grid" so to speak. Look closely at the pics in this post. He has a spacer bar clamped to the IT. The spacer bar is gauged from the floor of the oven. The spacer bar keeps the course level into the arch while the IT maintains the angle of the brick in relation to the anchor point. It is an ingenues technique. It could have been what the Romans did 2000 years ago
.
![Smile](https://community.fornobravo.com/core/images/smilies/smile.png)
Comment