Originally Posted by Hook_Line_and_Sinker
Yes air tight is the issue on thin gage with a curve , if you have a roller and some trial and error time I'm sure you can get the metal matched up but then you will need to work out a way to fasten it and make it easy to operate as well
thats why I chose the open bottom the seal is air tight! I got a 35 hour burn with 12 lbs of kingsford, could have gone longer but i wanted to clear the ash and cook more
Have you thought about a wood heater gasket.
just a thunk.