It's official. the factory drive doesn't hold up with drag radials. I twisted the shaft right behind the forward u joint. I also broke the joint in the middle of the drive shaft. Fortunately, nothing else was damaged. I was surprised when it broke but I guess the DS really is the weak link. I wonder what will break next? I ordered a new aluminum one piece from BlowFish Racing. I'm already going through withdrawals knowing I can't drive the Boss.