Btw, regarding lightsaber crystals. GL at one point said there are no 'colored crystals' - when you create your lightsaber, it manifests itself. A person that uses the dark side would end up with red (anger, hatred) and everyone else would end up with blue (loyalty, calm) or green (I can't remember what he said here...)
That got changed later on after he started working on Empire - but pre-EU; that was the case...
That's pretty much what he established in Clone Wars too.
Personally I prefer the old EU explanation.