Calchas, I wonder if you have been successful at booking and ticketing a xONEx in this manner, where the carrier that issued the ticket was not the first carrier in the itinerary? My attempts to do so with CX, AA, and BA were all unsuccessful. I realize that they probably could do it, but those carriers did not want to do it when I tried... So it seems, they really try to avoid doing that if indeed they are not the first carrier.