Well I've got to say, this mod is very promising keep it up! So far I've noticed some confusing things - like huge Jool orbiting tiny, but massive central body (Duna, for ex.), which have escape velocity of 50k+ m/s. Also it would be definitely good to implement Roche limit, as was mentioned above, to avoid very close orbits. As to compatibility with other mods - there is an issue with BoulderCo clouds. If a planet got equator radius boost, chances are that instead of terrain, cloud layer would get inflated.