Ady, I think that large building would not be seen in those two shots anyway, as it would be to far to the left from those angles you've done there. Really though, I'd rather you screw continuity a bit than cut out any of those falcon SE Cloud City fly-in shots.

Can't some transparency issue be fixed by isolating the part (Like in the cockpits looking out) that is see thru and freezing the element? I know if the ligting/shadows change as the snowpeeders banks it would be harder to do.

It seems like seeing thru the shuttle wings would not be hard to fix if u isolate the shuttle somehow. It's kinda hard to explain.