Finally delta.com let me route both ways through JFK. So I have another long weekend in Europe and will get 50,000 bonus miles with the two ZRH trips (I hope).
I'm up to six trips this year on this sale. I think I'll stop now, but if I don't cancel any today and fly them all, I'll have Gold status (up from 0) once they combine the DL and NW accounts, and I'll be in range of Plat. Of course I'll be cash-poor for quite a while.