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Gordo, if you want to measure consistently you need to use spike anvils on the mic-- using the flat anvil causes you to measure at a different spot on the bolt head vs. a single spot down in the dimple.
Also, does your mic ratchet? Can you repeat 10/10 measurements on your 50mm standard?
By marking the head with machinist bluing you can label each bolt and measure its relaxed length when you disassemble these-- then compare to the stretched length. This would be a good way to QC the bolts although ARP are very good, I heard once of one stretching like butter when installed. (somewhere here)
Nice thread BTW
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