CrazyDave, I would point you to the Normandy SR2 (Mass Effect Series) and the Y-Wing (Star Wars) for fragile looking ships that are both strong AND awesome
You could also say the same thing about most of the ships in Star Trek, where the engine and saucer sections are tenuously (looking) attached to the body of the ship.
Never judge a book by its cover.
Yes, the holes will be weapon mounts. In my tutorial I advise adding the actual weapon mounts later so you don't have to worry about screwing them up while working on the ship itself.
okay, yes, while those ships certainly have a 'fragile' look, they are MUCH larger than xlander's ship, so the 'thin' looking parts on those ships are actually still very substantial, as well as being protected by super advanced and efficient shield generators, the likes of which are not seen in Starsector. The Y-wing is small and nimble, and definately not designed to take a large about of punishment, relying heavily on weak shields that serve to protect them mainly from other fighter craft.
xlander's ship, on the other hand, is not nearly as large as those (i think. actually im not 100% sure of the scale of the starsector ships but im going to guess in comparison to the fighters) and has VERY thin parts. i mean those outer engines are being suspended by supports about half the width of a fighter. So unless it is covered in plating comparible to that of the normandy (which i believe would outclass and outgun any ship in starsector vanilla) and has state-of-the-art shielding to protect those flimsy areas, that ship would be dead in the... space?
again, take this with a pinch of salt, that ship looks really cool, i'd just recommend having a think about the practicality.