Frequent blade and bit sharpening. Even with tungsten-carbide blades and bits, the glass in the Coosa Board dulls much quicker than wood. As a result, blades and bits get sent out for sharpening more often. This latest batch, four circular blades, a dado blade set, about six router bits was a $200 sharpening job. The dado blade alone was about $50.
The upside at this point is we are using less and less Coosa Board.
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