I've read about people emptying some of their fuel tanks to save money. How is this done? I've tried everything I can think of short of editing the persistence file.
What I really need to do is fill some tanks, as I've run into this weird bug where some of my tanks have only half of the fuel in them, but 100% of the oxidizer, while in the VAB.
Today I was testing a skycrane by launching it without a booster and landing on Kerbin, and for some reason all of the monopropellant tanks were empty. Weird, because they are full in the VAB and while sitting on the launch pad, and become empty after launching, every time.
I've had the half-empty fuel tanks with other ships before, but this is the first time I've seen the completely empty monopropellant tanks.