The build is going ok. Pics to follow tomorrow. We are having a hard time getting a tight seal/connection of the pipe nipples using those conduit nuts. Are the "teeth" supposed to be facing in? It seems as if that is allowing there to be slight spaces in the metal. The welding of the fireboxes went great. Maybe if we can't get the 3 pipe nipples in tight we'll bring the barrels to our welder buddy to weld those in too. As soon as we think we had the 3 nipples tight, they loosen up/shift. This goes for the two with the caps as well as the one with the ball valve. The size of the holes we drilled are perfect. They allow for the nipple to screw in snuggly. However as soon as we put the conduit nuts on things get a little haywire. Any advise is appreciated.