do you try to syncronize something for new erx with old. like new fd with old shifters? is that possible?
there's virtually no difference between ER9 and ERX. I put an ERX RD on a ER9 group, without even thinking about it. From there, newer versions should work with older versions. The blue edition stuff, idk, as, afaik, the charging port is now on the FD, not RD, so idk if that's cross compatible (although it still might be). If someone has free returns on Alix and cares to experiment, would be interesting.