[larrynjr]

So here is what I ended up doing with that piece of pipe. I tried soldering it but wasn't satisfied with the results so decided to give this a go instead. I drilled the air pipe all the way through then passed the jet pipe all the way through so that the original hole is centered (more or less) and the pipe itself acts as a gas / air mixer.

So the net effect is that I'm running at a higher pressure, about 10lbs. and should be lower volumne but I have no way to acurately guage that. The flame torch as it burns inside the forge is blue and the forge is a bright orange heat with little dragonsbreath unless I close the air intake on the fan all the way. The air intake is closed 4/5th of the way. I didn't have time to try it last night but I'm guessing to get that white hot welding heat again, I would need to either increase the pressure to increase the volumne of gas or to enlarge the jet hole to get more volumne. Overall I'm pleased with the current results, as I'm getting a more consistent fire.