Your ERD measurment must be wrong for you to come with spokes that are 4mm too long. you have measured the ERD haven't you rather than assuming a number taken of the web?
Yes I measured again and again - must be the heat driving me mad.
@Thuekr started
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Your ERD measurment must be wrong for you to come with spokes that are 4mm too long. you have measured the ERD haven't you rather than assuming a number taken of the web?