HI,I hooked up the gas to my wire welder,reversed the leads and proceded to weld up some stainless, the bead was the bestI have ever done,good penetration etc. went in to take a break, then i realized i never changed wire to stainless,i still had in flux wire for steel.the weld didn' craak ,and kike i said it lloed great.for a beginer . I always thought the weld would crack and look very bad .any thoughts on this. rollin