The first sign that something was wrong was last week when I started to hear a loud 'whistling' noise from the engine bay, sort of like very bad electrical feedback tied to the acceleration of the vehicle.
Long and the short: No driving until fixed, on pain of seriously damaging/destroying the turbo. So they're waiting on gaskets from Nissan and will send the manifold to be engineered (?)
Also: had to withdraw from the 4x4community fun day at OTP this coming Saturday as we hope for delivery on Thursday, but there is no guarantee.

Will keep interested parties posted.