I seem to be having an issue getting this mod to work, and I'm assuming I'm doing something wrong so let me lay it all out. Current mods I have installed: BoulderCo lights and clouds, deadly reentry, procedural fairings, kerbal joint reinforcement, KWrocketry, modular fuel tanks (obviously), realism overhaul, real solar system, and stretchy tanks. Now, i read the ReadMe for this mod and I've done everything I could see to do. It mentions being able to edit the contents of tanks through the action group menu but for the life of me I can't see where to do this. I went to action groups, clicked on a tank and there's no options available to me (I also tried clicking on an engine). So because I can't edit the contents, none of my engines fire because they all say "Liquid Oxygen Deprived" and I can't edit the contents of the tank to have said liquid oxygen. Any help would be greatly appreciated. Thank you in advance.