You could make a version with none, a version with 3, and a version with 6 just to be on the safe side and make everyone happy :D
but i think 3 is enough.
anyways awesome so far, anyways, can you walk in a 360 around a planet or is the gravity the same ol same ol "fall forever thata way"?
if so, could you make the gravity extremely low to compensate?
im not much of a map maker, so i dunno the mission editors power. Sorry if anything mentioned is impossible.