I am ticketed, on 016 stock, for UA932 IAD-FRA and SK674 FRA-ARN. Because it is not a codeshare, I will not be able to SDC the SK leg to a UA codeshare of any type, right? Even after having read much of this thread, I don't yet understand some of the finer points, but I do think I know that I'm SOL because of the SK leg. I'd be glad to be told I'm wrong, though!