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MartyI do not have any basic disagreements with the overall grades of these cards.  I have questions about the sub grades.  How does Tinker get an 8 for centering?  Why doesn't the surface of 5 and centering of 8 bring this card higher than the corners of 3?  With the Keeler, centering of 6 and surface of 7 brings the corners of 5 up a half.  Tinker make it seem that the corners are the most important grade, but with Chance, surface of 3 is not raised even with a 4 for corners and 6 for centering.  Bender seems to be diamond cut only horizontally.