Jimmy thanks, I think there will be 5 aircraft involved in the flight test program. They had a wrong fasteners problem and those are replaced aircraft by aircraft.
I think there is a lot of new technology combined in the 787, so unexpected dependencies as you note might come up.
It must be that the experienced Boeing flight test department has factored in those possible obstructions.
That would mean the nett required flight test program is significantly shorter then the 9 months mentioned..