[big gear head]

Did they tell you what the filler material was for the welds on those headers? The color of the weld on that flange looks like silicon bronze. I've run into problems at work with 7075 aluminum. The guys that I work with keep making parts from 7075 and then bring it to me to weld it. They aren't very happy when I tell them they have to make it over again out of 6061. I didn't see any signs of balancing the shaft. How did they do that?