Aw, seems like we were trying to do the same, what a shame. Although I don't know why it needs to be so complicated, seems like it should be basic funcionality that should have been implemented with the expansion and was just left with the "default" fields that existed in the base game.

I have been wondering how can you control a rocket with the modding api. There is the event "on_rocket_launch_ordered" but reading the docs I don't see any "destination" or similar either on the rocket or on the silo. Also on the silo there is the launch_rocket method, but it doesn't accept any ...

I'm suffering this too, hope they fix it