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Needing a guard on a table saw is a myth too, as is wearing safety goggles when grinding! Having used neither for years I'd say I'd say I'm just lucky. For the sake of a couple extra feet of line, is it worth the risk?

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i've checked the bearings in my Hemi twice in the last 4 years, and have put them back in every time. doesn't look like it runs dry to me. so yea, in my case myth..