Your doing much better than I did. Had one bad KB piston. The pin bore on one side is scuffed bad from a piss-poor press pin install job. Called KB, gave them the weight. They send one piston, but they had changed the material in the past year, and the new piston was too many grams too heavy. No WAY it would balance even close. I"m still pondering what to do. Maybe I'll write a new post.