Really nice ship. Good clean lines with just enough detail work to keep it from looking flat and boring. Since you asked for some tips on exterior details, here's what I'd do: Experiment with adding a second accent colour. Maybe replace the orange on the engine intakes with green lights or make them into reverse thrusters. I think the orange and black bits look good but I'd try a different accent on the white bits. Try replacing the orange stripes on the white parts with green armour. The underside in front of the two turrets looks a little empty so I'd add a third turret in the middle ahead of the other two. On top I'd put a radar dish on the back end of the top of the bridge and the white stripe in the middle of the nose of the ship I'd replace with grey and add some antenas and maybe a big red eye thingy right there so it looks like a sensor array rather than a flat white stripe. The big white fins at the back are a bit plain so I'd seperate them into two halves with 3 blocks between them and some grey beams connecting the two halves but leave the oval with the serial number intact. Overall I think you've got a great looking ship and I look forward to seeing the final version.