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Old 07-25-2014, 10:17 PM   #80 (permalink)
freebeard
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Quote:
Bigger the hole, the deeper the required flange, according to my 'stiffness' tests. Quarter inch flange does fine up to about 1.5" diameter. Big holes, 5" and larger, need a full half-inch. Everything else does fine with 3/8ths
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