Must say the difference between gas and gasless for some people is extreme. My friend had been doing gasless for years, when I was helping hime weld his full cage for his car I brought my gas bottle and added it to his gasless sytem with the correct wire and his welds improve 10 times over immediately. He now makes a living creating artistic structures from cutlery welded together with his gas system - and he now has my TIG welder as well