Change unit resource upgrade cost

[Feofilakt]

Hello! What are the ways to change unit strategic resource upgrade cost? For example, upgrading Horseman into Courser would take 10 horses. I've checked dll and there is condition like "if old strategic type == new strategic type then strategic cost = 0"

 

[JamesRoper1403]

Same question?

 

[Feofilakt]

Have created a mod: https://github.com/Feofilakt/StrategicUpgrade. Has some restrictions, but seems to work.