It's simple, yet elegant! A 2 brick forge with a 30k btu Atlas Knife burner and it works wonders! Knives are up to temperature in minutes, and all 3 of them had no issues after heat treat!! I'm so glad I decided to try this little idea of mine! Here's a gallery of a few photos. I have a few more, but Imgur isn't playing nice this evening! Haha!! http://imgur.com/gallery/xRFxglL
The way I have it set up, I could run 3 of them in sequence, and have 27 inches of forge, with a minor amount of modifying. Could do swords in them, with 3 burners running, and the chamber is relatively small, so it takes no time at all to heat up, and it stays nice and hot!!
