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alignment/rotation
As a down Official (R2), I keep a piece of paper in my pocket that have the original alignment. On this paper I record subsitution and serves. The 1st time they serve I place a '1' near their number. The 2nd time thru I turn the '1' into a '+'. The 3rd time I circle the plus sign. I cheat and look at this throughout the set. It has helped me in identifying overlapping many times. Maybe someday I will be good enough and won't have to use my cheat sheet.
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