As long as the gash is not in the track, the flare rings don't hit it too much, you should be OK.
I had to change the surface of mine also; was too impatient to let wear do the job. Now the surface is back close to the original and it still hooks hard at the backend (5x3 drilling) and needs more oil than I face recently.
Backend borders on a skid/flip reaction; odd for a solid reactive, even polished. I might have moved thepin too far; 4" - 4.5" might have bene plenty.
Live and learn.
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"...for advice is a dangerous gift, even from the wise to the wise...."
J. R. R. Tolkien