Most of the time when I want to upgrade a ship it's just to add the newest engine or smaller weapon to tweak them a bit. I was suprised at first when I hit the upgrade button and was presented with a blank hull. I thought that it would show the ship I have then allow me to remove an older engine or weapon an replace it with the newer version. It would seem that this method would make more sense than having to "rebuild" the ship as it were. Anyone else have any thoughts on this one?