Over the last week I have started two random projects based off works on deviantart. One of them has evolved completely away from the original while the other I have kept close to the original artwork but for both I have run out of creative momentum and could use some advice on how to proceed, particularly with detailing though one has a very definite needs a reworking on part of the basic shape. My ultimate goal is to get both ships usable in FS2.
The first is an Alien.... thing with slight adjustments it could easily be a Shivan ship/installation of some sort depending on final scale.

Top/Bottom is currently symmetrical

Top is the rear view, bottom is the front view

Again left and right views are identical

A couple of views to give an overall feel of the design, top is a rear perspective lower image is front/top angle
The big issues I have here are the way the forward prongs join the forward hull and the general lack of detail overall. The basic shape I am happy with.
The second is a very Terran style warships using this as a base
by
http://jmonteiro.deviantart.com/ I have already secured permission to use the ship and be able to distribute it.

front/back

side view

top

The biggest issue I have is I cant think how best to detail the ship around the hangers, their supports and the section of the hull you cant see because of them.