[dogscoff]

I'm no modder but this is an interesting idea. A few points:

Sooner or later someone will point out that "streamlining" has no real effect on a space ship, since there is no atmosphere in space and hence no air resistance. Thought I might as well get in first, and say that you shouldn't let this get in the way of your plans though if it adds an interesting new twist to gameplay.

Secondly, there's nothing at all to stop you adding new hull types. Take a little look at Andres Lescano's ultimate vehicle size mod for an extreme example of this.

Nextly, I'm not entirely sure that hitpoints *are* dictated by tonnage, but I could be wrong. If they are, you might be able to get around this using component mounts - take a look at the pirates and nomads mod for some clever uses of mounts.

Finally, good luck with your modding.