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Hi JohnGalt, I record a time and grade for every top. There is likely no difference between "A" and "A+" -- so much depends on the way it was spun that one time, which mirror the top was spinning on, whether someone walked by and the room shook a little bit, etc, etc. Either grade means the top quickly set up on the center of the mirror, and spun without visible movement for the expected amount of time. I over-produced for this run so that I could weed out tops that were "A"s but with lower spin times and so that I could send out a really good batch with high times. Thanks! Steve/SRfPT