Hey, you could give it to me! I'll even pay postage.
From my point of view, the rubbed off paint marks show that the damper was doing exactly what it was supposed to. As the power stroke pushes the hub ahead, the inertia ring stays behind, tethered by the rubber that's between the two. Then the rubber unstretches and the inertia ring is back to the starting point, when another power stroke happens and the same things occur again.
The rubbed off paint shows you how much the inertia ring actually moves. I'm surprised at how much it is, but I've never had a damper on a 1000? hp engine either.
R.
