Im tempted to clamp it to a bench and hook it up and try it. It’s a custom fit to the bottom. I think I’ll put it in the ultrasonic cleaner tomorrow with some strong cleaner and see what it looks like afterwards. Maybe a vinegar solution. Hydrostatic testing of the boiler will be done tomorrow also. If the burner doesn’t look any better, I’ll have to find a camp stove burner or make another one. Got to buy cap and plugs tomorrow also to plug the boiler up for testing