One of the last parts of finishing an oven is checking the inside of the dome. To do this, I get inside.This is the last chance to fill any small spaces in the final few courses of brick at the top of the dome. Not being claustrophobic, it is also a bit of a caving experience and I get to look at my work from a pizza-eye view. As you can see, setting up a platform so that I lay level with the shelf and mouth of the oven is essential. I might recommend that you have someone nearby in the event you get stuck.
The owner of this oven, who wanted a visible exterior dome also wanted it colored charcoal grey. Here's the final face: