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			I have scratched the yardages of each penalty beside each signal and if it is a loss-of-down or automatic first down as well, you can't write on vinyl cards very easily.  This way I can not only quickly look up and be sure of a seldom used signal but also get the right yardage and next down correct.  It has been helpful a few times.  It fits in the same folder as my game card and pencil.
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