Maybe avoided there since only the one side was replaced and the whole mechanism stayed in one piece?
Both sides were replaced in the link i posted.
Haven't done it myself, but assume, that 1mm tolerance refers to the position of the axle and the shell. It shouldn't be too hard to check that there's for example 5mm of axle coming out of both sides of the hub and not 4,5mm and 5,5mm.
@Samuli started
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Maybe avoided there since only the one side was replaced and the whole mechanism stayed in one piece?