404 Titan
The B777 and the B787 aren't assembled on the same line so QF trading some B787 slots won't free up slots on the B777 production line. They are the facts. Sorry to spoil your day and a good rumour.
I've re-read you posts and come to the same conclusion as Bad Hat Harry, in that you appear to be unable to accept that there is something happening which is contrary to your knowledge of Boeing production lines.
The swapping of B787 slots for B777's was simply speculation by a journalist - nothing credible there. I would think that Qantas would keep every slot on the B787 production line (irrespective of the B777 decision) because they want to replace all widebody aircraft (except A380 of course) with these very efficient aircraft.
My source is very well placed and his opinion is that the B777 order is virtually assured.