Hi Tom
Looks like a great start, there are some small differences with the original millenium falcon though.

The hullplating is different, the color is different as well
I have compared it with this image:
https://blogs.sun.com/kevin/resource/m-falcom.gif


I would change the background as well it puts me a bit off and doesn't add to the image.
But as said earlier it looks like a nice start