OK, I will stand corrected from my statement that all 9sp Ergo works with any 9sp RDs.

However, I owned a 1999 Marin Vicenzo with Veloce 9 (pointy hoods) and in 2002 replaced the Veloce RD with a new Racing Triple 9sp RD (and a bigger cassette) and had no issues. The bike is long gone so I have no proof of my claim.

Apologies for any mis-information.