Analysis of information sources in references of the Wikipedia article "Millennium Falcon" in English language version.
Bill George had been making a replica of the Millennium Falcon [ . . . ] we were so frantic to get more buildings into the cityscape that we grabbed Bill's ship, bristled it with etched brass, and plopped it into different shots. Instant building.
It's a very simple ship, very economical ship, although the modifications he made to it are rather extensive – mostly to the navigational system to get through hyperspace in the shortest possible distance (par-sect) [sic].