Campagnolo question

[T-Crush]

Okay, a question for the Campy braintrust. I have two Campy Chorus 11 rear derailleurs, one has an "A" on the inside arm of the parallelogram, the other doesn't. Here's a pic of the A. And if it makes it somehow shifter specific, how do I tell which set of ergos go with each derailler as I have two sets of those too. Thanks in advance.

[helldriven]

Copied from another post.....

All the Chorus components that are post-2015 should be marked somewhere with the letter "A" in a square. This supposedly indicates the compatibility of these parts, but I understand the parts are not as incompatible as Campy would have us believe.

[zmalwo]

peel back the hoods and see if you can find an A on each of the shifters. A and As go together

[slowpoke]

Originally Posted by zmalwo

peel back the hoods and see if you can find an A on each of the shifters. A and As go together

Or if there's a small sticker beginning with EP15- or EP18- on the ergolevers.