EDIT: changed my mind about how I wanted to ask this question since every time I think I've figured something out, I dead end. I think I can handle the other two components of the mod (a building that replaces the University and a unit that replaces the Warrior Monk). What I'm having trouble with is the leader trait: Originally, my intent was to have them start with Archery, and have ranged units get +50% ranged strength while in a city or fort. It seems like you can't just start with a tech in this game. I was initially looking at ADJUST_TECH_BOOST before I realised that just adds a % to all tech boost effectiveness, and it seems like MODIFIER_PLAYER_GRANT_SPECIFIC_TECH_BOOST only works with the pre-defined boostable techs (GREATPERSON_ROCKETRYTECHBOOST, GREATPERSON_PRINTINGTECHBOOST etc.). Is this even a possible thing to do or should I go back to the drawing board and find a new trait?