Nice stuff Xpand! Crit time:

1: The main one for me at least is the rear spoiler, it (to me at least) looks too straight and messes up the lines of the ship/ looks a bit plain. Why not make something of it? Perhaps make it a slight curve, or maybe break it up a little.

2: Again, a personal thing but I think the cockpit should be slightly squarer (for some reason the cockpit seems too round when compared to the rest of the body- esp the spoiler).

But its a solid design... keep at it!