I just booked a TATL on LH in March because LX was showing nothing but J availability (as was SQ on JFK-FRA). They said if LX opens up I can change later for no fee. Does LX generally open this up later or do they block F availability for partner airline issued rewards (Continental). Also, slightly off topic, but does SQ ever open up on JFK-FRA either? If possible I'd prefer a more updated product than LH, otherwise I will somehow make due on the 346 (sarcasm). Thanks!