That's concerning. My bike is Chorus 10. I know I can convert an 11sp Shimano wheel to a 10sp Campy spacing using an Ultegra 10 cassette. You just add .2mm spacers between all the loose cogs, but that may only work on certain cassettes. I remember I couldn't replicate a 13-26, and ended up with 12-25 instead. Not too different but I know how particular people are with these things.