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Edley, yes many of them were tapered I believe to help provide the illusion that they are not too narrow in the middle and wide at the ends. It makes them look straight (same width side to side and end to end) if they are tapered correctly. I believe Bob Putnam has posted on this before for ERA, and you might find some specs on the ERA website... It's in the ERA manual too. Good Luck.
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Duane
Western States Cobra Group 1998-2016.
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