Hi Jakob, as I see you are building a gasifier with a center nozzle, I have a similar design in mind, except that the holes in the nozzle would be directed slightly downwards, so the nozzle itself would be slightly higher and less exposed to high temperatures. I will make the nozzle out of steel for improvement, I have already tested this on a charcoal gasifier and it works. This construction system makes it possible to compensate for lifting and lowering the nozzle, as well as easily demolishing the bridge by moving it.
You are a cute family, you work hard and diligently.