Is this a good design for a a foundry burner? The hose hose for the natural gas are connected with jb weld. The thing on the back is a way to connect my output of my shopvac to the burner. The pipe attached to the other pipe is for the oil hose to be connected to. The front is tapered inward for a venturi effect. Its welded to the other pipe and I think I might put some jb weld over it to air proof it. I need to grind down the front of the oil pipe to make it flat with the outside pipe.