Do you plan to introduce "terastructures", i.e. some sort of mechanism where one can convert an entire cluster and dedicate it to some task the same way gigastructures do with galaxies?
Btw the gigastructure calculation is borked in late game. Once gravity and other parameters are getting high (not very high - about 8 to 10 G is more than enough), converting individual super-/hypergiant stars into Dyson spheres/Matrioshka brains provides more energy/E store/research than converting the entire galaxy into a gigastructure. Even though one can build those an individual megastructures then convert the whole galaxy and retain both bonuses (bug or feature?), the gigastructure should as per formal logic be at least as effective as the sum of all normal and megastructures that otherwise could be built there, right?