Thanks, Ernest - what i was considering was booking my one-way F right now while it's available...(knowing that I'm using a stopover in HKG for a short time) ... then as soon as the "onward" leg becomes available ( J only, in that next destination, no F on that plane) - I'll add it on. Since there's just one F, I'd rather not wait, "just in case." Does this make sense? I don't mind the $100 as much as I would mind losing the F.