Hit a nice porcelain insulator deep inside....
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Cut the slab off, got the blade past it and kept going, (with a different blade).
Next cut I went until I was real close then turned in around a came from the other end before sawing the lag off.
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These were farmyard trees so I warned the customer that he was paying $25 for every blade we ruined...... no skin off my nose this time.
And that's what a blade looks like after trying to cut porcelain.....
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