Try to think a bit more practical. When you add things like "solar" panels and such.
Rotating "things" of that magnitude would be very time consuming to maintain. Remember that there are micrometeorites in space.
Also, try not to make the model look pre-historic when in the Freespace II timeline. Yeah Pirates would of course not have the state of the art technology, but they would still have access to old ships such as the GTC Fenris and Leviathan Cruisers. These did not have fighter bays, so you could add a fighter bay to a fenris or a Leviathan. Use COB to POF found inside PCS to extract the models.
I don’t know if PCS uses the same routine as the old COB to POF program, but that old prog. Flipped all of the polygons, and I quote “the author did not know why the textures sometimes came out reversed”. It was because he flipped the normal the wrong way. So FLIP them again if it does this.
Tip: a great way learning how to make good models is to see how others have created theirs, and don’t be afraid to use Sweep aka extrude, scale separate polygons. Just remember to backup when you are satisfied with the current look of your model, so that you have that backup when you do something to your model that do look not so good. This is because Truespace has “limited” undo turns.
Furthermore, before you start to make your model, lean back, and imagine the model in your head, the why`s and not`s and practical reasons for your model to exist.
But I know you are just learning to model, so don’t be afraid to experiment with anything, it is the only way you can learn what to do, and not to do.