At this point, you have just a few key areas left to finish on your own. On the top, we have the recessed mechanical area and the empty spot by the nose:
On the bottom, we have the rest of the landing gear bays and (in my case) the extra set of mechanical areas in the nose:
By this point, you should have no trouble completing those areas on your own. You can duplicate parts from other areas of the ship, or create completely new objects—it's up to you.<pagebreak></pagebreak>
Here's what my final ship looks ...