One technique is to arrange your work so you weld downhill, and pull your tungsten out about 1/2" to 3/4" past the end of the gass cup, and when you establish your arc, rotate the stinger to where your arc is almost 90 degrees off the side of the tungsten. assuming you have a tack weld at 2 - 3" intervals, the stainless will fuse weld, and you can move the electrode fairly rapidly, and not need to add filler rod.