Clydefrog, you may not know it, but Librarian is one of those Californians that are leading the fight against the anti-gunners in CA. He is as well versed in CA gun law as anyone I know.
Of the three sources you listed, www.handgunlaw.us
is probably the best. But even Gary Slider (who runs that site) can't give you the nuances of CA gun law that Librarian can.