I'm sure part of the reason for the late delivery of these units -
well the 377/5 at least - is that despite press announcement some time
back about SN ordering them (before the TL loan/transfer was clear)
there was quite a gap between ''letter of intent'' and hard order.
That may have pushed the suppliers back - and their subcontractors
can't react after a lean time to suddenly ramp up. If I recall
correctly the hard order was only placed around about mid-summer 2008
when KO0 became clearer.

--
Nick