I dumped my gasifier out to look at the nozzle.
It’s still hard to see even with a light and my camera to look inside the tank through the 3 inch hole but I’m pretty sure I can still see some threads on the pipe so I’m not going to mess with it yet. I did find a lump of metal slag when I dumped it but it was probably from one of the holes I cut.
I found a thread here that probably has enough details to figure out the water cooled nozzle idea. When my nozzle is no longer usable I MIGHT try something like this. That silicon carbide tube bushing might be an option though.
https://forum.driveonwood.com/t/mikes-venture-into-the-dark-side/4675
and this one that shows Gary’s copper nozzle.