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@Scilly.Suffolk
Looking at the 2001 catalogue, it seems the change only affected the compatibility of 9 speed components.
When 10 speed was introduced in 2001, the Ergos and rear derailleurs were remodelled; 9 speed groups got the same makeover which made them incompatible with 1997-2000 9 speed set-ups.
So if you're just looking at 10 speed: no problem as they all had the re-design from the off. Campag catalogues available here.