So, I'm making a 2-stage to orbit craft. I got the launch stage down, and I'm currently making the second stage.
So I've built the second stage and set things up, But I can't figure out how to get NCS adapters to have Oxidizer in them instead of just liquid fuel.. (I'm using them as the main fuel tank because A) They look cool and B) The payload is rather small, and they hold quite a bit of fuel for their size.
I wouldn't be surprised if this is impossible to do in vanilla, but if that is the case does anybody have a mod that allows this to be done? (Doesn't need to be compatible with breaking ground or making history; only 1.9.1)