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@nomoreknees
I see this has been resolved, but in case anyone else has the same issue, file the ring(s).
This is exactly what I did to get some rings of my favoured size to fit a centaur compact chainset.
1 - elongate the hole on the ring that sits behind the crank arm to accomodate the offset.
2 - file the flat surface on the ring behind behind the crankarm if your ring is thicker than the campag standard.
Took a while and isn't too pretty, but worked a treat.