Largely because i want to be able to do it with multiple buildings. specifically each planet can only have 1 factory and 1 culture centre but can still have as many of any other buildings as its slots would normally provide, so balancing the slots out is impossible (unless i make factories take up half of your civilian slots, and culture centres half of the tactical slots, but id really rather not do that).

like a have written in another thread that is what makes me wonder how sins should be modded. ususally i would say i add this to planetupgraddef:
>
path:factoryModules
stageCount 1
stage
price
credits 0.000000
metal 0.000000
crystal 0.000000
upgradeTime 0.000000
maxModuleSlotCount:Factory 1.000000
maxModuleConstructorCount 1
>

and change these 2 lines in PLANETMODULE_PHASEORBITALFRIGATEFACTORY.entity :

>
planetUpgradeSlotType "Factory"
planetUpgradeSlotCount 1.000000
>

but if i add only one single line to planetupgradedef the game doesn't load anymore.......

Either these entries must be registered or defined somewhere, or it is not possible to add new entries.

Ok i have to admit, that alle the "path:..." entries are connected to upgrade buttons and have some definitions somewhere, but hmmm, i can't find an opening anywhere to access the game mechanics easily, haha