See this post I did a while ago. If you can understand the garbage I wrote its something to use in conjunction with the sheldon method.
http://www.londonfgss.com/thread4742.html?highlight=chainring+centre+sheldon#post143107
@ChrisNW started
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See this post I did a while ago. If you can understand the garbage I wrote its something to use in conjunction with the sheldon method.
http://www.londonfgss.com/thread4742.html?highlight=chainring+centre+sheldon#post143107