I finished fabricating my new gas forge today! I built it from two 6" lengths of square tubing, cutting off a side on each and then welding it together to make a rectangle OD- 16"x12"x6".The fire chamber is approximately 16"x8"x3" - 384 cubic inches. It's lined with 1 1/2" thick duraboard 2690 I believe (free scraps from a friend) and 4 fire bricks as doors. The two burners I fabricated similar to ones on Zoeller Forge's page. They use .35 mig tips and it will heat 1" square stock very fast. The gas piping has a 3 position valve (Off and two outlets) so I installed a second gas supply circuit with a needle valve that can be set as a lower output pilot for idling while I work. I haven't tried to reach welding temps yet - but i'm certain it will reach it no problem. I need to do some fine tuning on the burners - but at 8 -10 psi - the forge works great currently. I am going to add two air draft swinging covers on the tees on the burners so i can adjust air - one sputtered a little for a bit (covering the tee air inlet slightly with my hand cleared it up). I am very pleased with the forge - the size will be able to do anything I decide to work on at this point. The portability and weight is great and I can have it in my driveway and running in 5 mins. I do need to add a bracket support in the front so I can stabilize pieces of length - I'll tack weld two 3/8" nuts to the door support as a removable mounting very soon and post another picture. I was able to use a lot of free materials from friends and the gas plumbing was found at a yard sale - coffee can full of fittings for like 10$. My total cost for the forge was around 100$ out of pocket! I did a lot of research before building this project - But if i missed something - Please let me know!