That is why there's moto101 right?250, you don't understand, it needs a 10 page debate on which way to do it. Also, do you use a measuring tape (the spring loaded ones) , an engineering 1000mm calibrated ruler, an industrial vernier - 250 you know that, you have to get it spot on to 1/100000mm
Now you just taking the piss
No man. TIA here we ignore all regulations and do as we please.
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make sure all the calibration certificates are in date and available for inspection by Oz