[ssinister]

i tig welded these with a miller 250, on the ss tank and roll bar mount I used 3/32 red tungsten sharpened on a used 120 grit belt sander spinning in a drill. I always sharpen parallel to the centerline, but have only used a dedicated tungsten sharpener when I worked at Eaton Aeroquip. I might be able to help some of you with questions, but like Greg I am far from an expert. I do have some experience with rare metals, so I might be able to help there a little more. I have welded several alloys of inconel and titanium.