At 11:00 he goes at it with a 6011, and you can see him whip it. Im talking going 3 times that fast, no whip, basically hardly even spattering, just throwing berries in the gap. Then you whip over it like that. At 12:00 he's trying to fill a hole, and he gets it eventually, but moving even faster it'll build up quicker. Once again this is on very thin stuff, or stuff that you can fully penetrate with no problems. Turn it down to where it barely runs, but hot enough to actually weld. Also remember that the metal always follows the heat, so if you run up on each end when filling the hole, past the hole a bit up onto the thicker weld, it'll build it up because the metal will stick better. Basically on thin stuff when you are trying to fill a gap, go as fast as you can damn near can. You will think you aren't getting it, but you actually are.