Yup, problem was definitely with Tweakscale, so I have removed that until they get a fix out. I had another question, regarding the Asteroid Spawning. I seem to be getting lots of asteroids spawning inside Earth's SOI, this has resulted in multiple Class D and E rocks spawning and promptly smashing into the surface of the planet, which I think we can agree is a little unrealistic. I also have a Class D which spawned into a captured orbit, giving the Earth a second moon pretty much. Is this intended, or just a consequence of the Asteroid spawning code???