Old 06-26-11, 11:17 AM
  #24  
unworthy1
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"dimpling" with a punch is what I'd call a poor man's knurling, and I've seen it used on many a crown race (even some very high priced brands) and always seemed to work. The steel of just about any headset is harder than most any headtube, so you probably won't risk to damage the cup(s) or races. Only caveat is not to get so aggressive with a really sharp punch that you see the dimples show on the outside of the head lug (e.g.: don't give this job to a gorilla on caffeine)!
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