Several years ago I gave a seminar about some of my research. I started out with a very simple example. One of the faculty in the audience interrupted me to say that he had worked on something like this several years ago, but his model was \much more complex". I replied \My model was complex when I started, too, but I just kept working on it till it got simple!" And that's what you should do: keep at it till it gets simple. The whole point of a model is to give a simplied representation of reality. Einstein once said \Everything should be as simple as possible.
