brick setter

[NickR.]

brick setting tool

[NickR.]

what is the tool called that sets the bricks on the dome

[UtahBeehiver]

Indispensable Tool aka IT, do a search and you find hundred of posts on different style and shapes. There are several key design components to a correctly design IT. I suggest you download and read the free eplans from Forno Bravo. It will give you a good baseline for design and construction of a WFO oven.