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I've been working on my first gasser and I would appreciate any advice before I wrap and cast the refractory. What I'm working with: Ceramic Fiber Spun Blanket, Temperature Rating 2300°F - 1" thick Vesuvius Hot Top Moldit Plistix 900f IR 1 inch forge/foundry burner (An 1" wide, 16 1/2" long atmospheric burner 0.45 mig welding tip and sliding choke) An old propane tank Uses: Light foundry work Pattern welding General purpose forging I've got an idea of what I'm doing, and have had a chance to talk to a few local folks to get their opinions before starting the project. I bought the burner some time last year so I was kinda locked in and almost everyone I know uses 3/4" inch or less burners. In my mind I'm planning to have a narrower entrance (~4") with a blooming internal forge area (~8") a flat level floor. with a hinged door on the rear end. It's clam shell and I don't know if I should let the two haves meet flush or try and have them line up like this... / \ .. In my mind it seems to allow for less heat loss... The burner is mounted just over 65 degrees in the middle but off to one side. Rex Price mentions 600 cu inches but with no firm suggestion. I've been advised it's best to go for less than advertised volume so I figured out a 12" by 8" cylinder is just over 600"cu inches. My forge body is just over 10 inches long. Depending on how the wool fits I'm guessing right now I'll end up with between 450" and 500" cu inches.. I'm kinda worried this may not be big enough or I may have a hard time regulating down far enough to keep from burning small stuff.. I'm sure I'll be happy with what ever I manage to build but I've learned a lot from many folks here and I figure you'll never know what you don't know unless you ask. Thanks! (Edited - Forgot to resize my photo.)