The spaceship which we all know and love from the Star Wars films was just another in a long line of freighters which began with the YT-450.
According to the Star Wars expanded universe, the 450 was slow and under powered. But is set the basic configuration for all the enhanced vessels which would come after it. As far as I am aware the 450 was never depicted visually and was only ever described in text.
The model began as the quite ill-fitting D.S.-9 Defiant from AMT. I changed things a little.
