I've fabricated a couple of burners out of pipe fittings, Reil style, .035 mig tips, 6" x 3/4 main pipe with a 1" nipple as a flare into a tank-style forge. First run, wasn't getting enough air. Drilled some intake holes in the main pipe, pretty much even with where the MIG tip ends... here's my question/concern: runs like a champ at around 5 lbs pressure, but any lower, and the flame starts coming out the intake. I've seen other burners where the end of the tip is visible through the intake holes/slots...do I have to move the intake holes back? Do I need to worry about imminent death/disfigurement if there is a bit of flame coming out of the intake holes? appreciate any feedback, this build is really for my 12 year old son who is totally enamored with the idea of forging, so hey, if it ain't an xbox, I'm all over it.