It took me a little while to get the fire going this good. To start with what I was trying was dripping the oil into a stream of air from my shop-vac on blow, atomizing(?) it then carrying it through into a fire that I'd already lit to get some heat into the fireplace. Unfortunately that didn't work.
The next thing I tried was to just jamb the nozzle from my previous test(here) through a gap in the bricks and backfill with dirt. Unfortunately I forgot to take a photo of that as well.
This was the result:
Here I was deliberately running rich to get the big fat flame to come out of the fireplace and shed some light on the surrounding area so I could see what I'm doing.
I took a little video of this and I will share that as soon as I have it edited together. I am going to play with this fireplace as it is for a while and see if I can get a bit more heat out of it, then I have a small gas bottle that will probably become my new forge. I will probably be lining that with some kind of fireproof material to help stop the steel from burning out.