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@gizmond
Using my best schoolboy art, here is the problem, using a 42t ring
with a 102BB the chainring bashes (touching, jamed against, won't move) on the chainstay and is already at about 44mm chainline,
with a 107BB the chainring clears the chainstay but I am out at like 46-47mm now,
so, is there a way to get a 42mm chainline? Bend the chainstay out of the way? Bash a dent in with a hammer? Something less drastic? ??!?!!!?!