Actually, in that long thread, some of us might have missed the wonderful post by Marv Weaver. I took the chance and stole this jpg, because it was so perfect and simple at pointing out how silly the scale looks.

What the heck is going on? How many like new grades are there (nine?) and what's the difference? Lets see, a finger print maybe, dust from the factory, lint from the felt? ;)

But as far as I can see this is totally confusing and rediculous. It would take a book just to explain and define the differences.

BS100 applies to the grading scale!