not bad a'tall. You might also post this in the Wings forum, you'll get more specific answers there.
Only thing I see is that there's  the driver's place, looks like it might be in the top pic. One trick is to make the front panel transparent (in Bryce), and pop a small radial light in there. just an idee.

Looks like you've got hardening edges down fairly well, it works in Bryce (though not as much in Poser). Bryce will try a little smoothing of angles, though not as much as Poser.  You've come quite a ways since you started posting, and the hard work is showing through.

Another thought might be the tubes connecting the outboard engines to the central portion. Maybe flatten them on the Y axis to give it a more 'winglike' look (for that matter, you can just grab the faces on the outboard engines and move them around as you like. Just don't save unless you like the result..;)

The thing I haven't mastered yet (and is worth a look) is UVMapping the exterior to have all the wicked signs, symbols, and verbiage that will make it look 'cooler'..;) Also, you can add textures that have far more detail than you can comfortably model (like I keep forgetting to do).

keep up the good work.

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)