04-06-2016, 12:51 PM
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Incorrigible Kit Basher
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Join Date: Jul 2006
Posts: 1,888
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Actually, some time back one of the members here posted an extensive comparison of the Bertha/Ranger family fins over the years. They've actually changed a couple of times. Given that, I think swapping an 18" piece of BT60 and calling it a (full) Bertha is quite acceptable (and a darn good deal to boot).
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