also, when i was in josh ahearnes' shop i saw his torch hoses run from the tanks to a little brass dome then to his torch, which hung from a wire rod poking for the brass dome thingy. It had a small pilot light on the other side...i was too embarrassed to ask what it was, I at first though it was some sort of gas-flux apparatus but now i think it was some sort of hanger-activated pilot light. anyone know for sure?