The elbow keeps the flame on the torch as well as a coupler seemed to and I liked that I could mount it with the gas line well away from the forge. I looked at T burners again, didn't realise the jet moved in and out. Thought it was tuned with pressure and choke. I guess my chokes redundant then if its too rich. Do T burners and sidearms usually have the jet past the air intake so the air is sucked in from behind the jet? I can't get black iron here but i'll put in vinegar.