hey i have a propane forge ive been using it for about 3 years, and the burners on it stink, i mean pretty bad, did not know what i was doing when i made them, i have lurned alot about them since then, i plan on making some new ones now and want to build something similar to the T rex burners, i can see that it has a 3/4 neck, about 9 - 10 in long, also that it its lathed at the air intake, the bell that reduces to the neck, then welded to a larger pipe that has fore slotted holes, it has a sliding air cover, that back cap it just welded on, but how dose the back intake tighten to the little gas jet, its some kind of fitting that shrinks as it scrues in, and what type of tip is in the burner, a mig tip, what size, dose anyone have the blue prints to this burner?, i would like to just buy one for the man that makes it but an pretty hard on money