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It's a Torrey, so it's worth the effort. Hone on the 1k till you get to good steel. What do you have to lose?

Dropping down to the 3k is worth trying once, but what you now have described may require more time on the 1k.

Try just dropping down to the 3k and see if you can deal with the one microchip there. If so, then move back up to the 8k and proceed with your stropping.

Congrats on your accomplishment. You...