The Polish e-shop weldes.de has 3 different types of gas nozzles for the MB-15 torch, Conical (narrow 9,5mm dia), Standard (12mm dia) & Cylinder (wide 16mm dia). See bellow pics. Which one is best for welding ALU? Using my poor experience from TIG welding, where a wider gas nozzle produces better results, I conclude that the wider one (cylinder) will be the best for MIG welding ALU, or am I wrong ? Has anybody experience with narrow or wide nozzles ?