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Iridium spark plugs are only for longevity. It's pointlessly wasting money to use them in an engine whose plugs are accessible. Sharpening the side electrode will increase the amount and speed with which it erodes.
Fiddling with spark plugs beyond making sure they're properly gapped -and that includes using a wire gapper, not a ramp- is the sort of thing you do to get that extra .001 horsepower out of each cylinder. You'll have more variance between cylinder firing events than you'll gain from exorcising your Obsessive-Compulsive Disorder through plug tweaking.
But if we weren't like that, we'd just drive Chevys.
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