I guess that's a fair point...but think maybe I have more seriously bad deeds to feel guilty about that this one. I definitely have to manage the time spent feeling guilty about my environmental degradations ;).
I never messed about with the tip...changing the lift angles wasn't really worth it, just replace when those are gone too far. Plenty of uses left if the tip thickness is not much over the kerf width. Beyond that, discard.
I trim mushroomed backs down by driving the wedge into a kerf on top...
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