Here's another idea. If a spacestations is with in say 5 to 8 parsecs of a shipyard you can select upgrade spacestation from the build list. Or if a spacestation has it's own shipyard it can upgrade it's self. This would get rid of the hassle of having to build and manage dozens of constructors to upgrade a spacestation.
A mining ships doesn't dismantle themselves to build a mining station, so why should constructors have to?
Why does a constructor have to be used up when building a starbase or adding a module to it? I think that it should act like the mining ship and spend a few turns building and be able to move on to the next job. In addition the constructor should be able to carry more than one construction module so as to speed up its work. Example say a starbase takes 5 turns to build, with 5 construction modules on the constructor it can be finished in one turn, or 5 constuctors with 1 module could work toge
