Originally Posted by
gosmsgo
You can see the damage. The start to "hook" rather than look uniform on the drive and non drive side fo the teeth.
Maybe you right, perhaps some people can see it. I can't. The only thing I can see is non-symmetry that was engineered into the cassette from the start.
AFAIK, they are not made perfectly symmetric this day, for the better shifting performance or some such reason.