Well, the board is either fixed, or it's going to run terribly. Cross your fingers and hope for the best. I'm at my technical limit right now.
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How do you set the firing pin depth on a No4 Mk1?
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By filing the tip. The pins internal collar should contact its matching part on the rear of the bolt head then the tip is adjusted to (IIRC 0.004~0.008)"
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