I still find it challenging to stamp serial numbers in the bottom bracket. It's not so easy to get everything correctly orientated, I need a very accurate and powerful strike with the hammer, if the first strike is not right it is not so easy to avoid a double number, problems with the BB going out of round, etc. Is it just me? Any suggestions? Seems like a jig would be a nice idea?
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: Stamping serial numbers