No, I think you're relatively close, although I know for a fact that Imi's creation of self defense was ALL based on instinctive reaction and logical movement based on state of readiness, rather than someone else's technique.
You touch on a good point, though. Once you understand KM's basic principles (which are all related to a clear understanding of self defense) then you should be able to come up with a defense similar to KM's even if you haven't seen it. Darren Levine, the US Chief Instructor, often talks about getting his foundation in KM, then going back to the U.S. for a number of months. He'd be asked "What does KM do against...?" without having seen that particular technique. He'd have to come up with an answer based on his understanding of the system, rather than direct knowledge. Then he'd fly back to Israel, check with Imi, and discover that he was right because he understood the PRINCIPLES.