More space structures image - Star Wars Alliance Rebellion mod for Star Wars: Empire at War: Forces of Corruption
Alliance are a serie of different mods. On the Star Wars GC, you can play the civil war Empire vs Rebel era + Black Sun and soon the Republic and CIS.
Now you can build even 5 space structures, you can know if there are more because you can see them on the "sell structures" option.
The Golan will be builded. The Golan I can be builded at a starbase 1 and 2. Golan II needs at least a starbase 3 and the Golan III a starbase 5. You will have two options at planet with starbase 5, you can build all the levels or sell the old after you build the new gaining a position for build other structures. If you build the three type when you defend the planet, you will see 4 Golan III, one Golan II and one Golan I. This is the main difference from the feature.
The Hypergun and Iongun space stations will not be able to be builded more as single stations, they will be a complement from the additional super star destroyers station.