Is there any issue with running a Campag 11 speed (athena) chainset when the rest of the groupset is 10 speed Centaur?
No problem at all. I'm running a 11spd Chorus chainset with 10speed chorus/record mix and it works fine.
Nah, I do the same with Chorus 11 and Centaur.
lovely cheers - I couldn't see there being issues but its good to hear first hand experience.
Just got the Athena chainset from Probikekit which is currently nearly 20 quid cheaper than the 10 speed veloce!