I discovered a problem with my plan. My nozzle still isn’t easily replaceable but that can be fixed with Tom’s suggestion. The problem is the way I have been cleaning out the charcoal is to just flip it upside down. I won’t be able to do that if I keep adding to this or mount it on a base.
Here’s one solution.
The link in that post goes to some pictures of Giorgio’s clean out port. Large pipe fittings and pipe caps are expensive and I can’t tell for sure but it looks like Giorgio’s version isn’t threaded. Where my clean out port would go is in one of the hottest places on my gasifier. Would woodstove gasket rope and high temperature silicone handle the temperature at the bottom side of my gasifier? I’m thinking a section of square tube welded on the side unless I find something better.