Star Wars-ish Explicated!

I'm gearing up now for another "season" of Star Wars-ish. As before, we are going on a radical re-interpretation of Lucas' opus: the original trilogy is the only canon. The Jedi were almost exterminated long ago - about eighty years, long enough for people to think of the Jedi as "some old religion". There are no midichlorians - the Force is a philosophical religion. Anakin Skywalker became Darth Vader about 20 years ago. The extended Universe simply does not exist, as well as the second trilogy of films - Episodes 1 through 3.  Jedi of the Light are just as unbalanced as those using the Dark Side of the Force. Those using the Light Side do so because it gains them power - different but equal to the Dark Side. Jedi can choose to be neither, and can access both Dark and Light-Side powers, but but at a lower level than those committed to one side or the other overall.  The Empire is basically pro-human and rather racist about it.

We are using StarCluster 3 as a system, adapted to the setting, with the Force replacing PSI powers, but using those labels to enable us to use the CharGen unchanged. Ships are limited - no one uses missiles in StarWars - and using the optional dogfighting rules from In Harm's Way: StarCluster for small ships and fighters.

Right now I am Genning-up star systems. In StarWars, there is usually one world per system, but they usually mean one important world. The other worlds are simply ignored. I am creating full star systems in case the less important worlds in the system become  important to the game.

I would publish the rule-changes for StarWars-ish, but I don't know the limits for this - are things given away for free, but written for a specific publisher's system *by* a designer/publisher of that system considered fan-made? Does anyone know the limits of this?