When we call the controllers the key, that is the basic truth and not only an analogy. Before you can do anything to an area you have found, and want to control, you need to unlock it - build your controller. The controllers do not come in many versions like the Land Control Personal Towers. (These I will consider in later articles.) Their principal feature is really their Quality Level (QL). The QL of the controller is the definition of the controller. Let me briefly explain: Well, I think that covers the basics - and some of the advanced aspects of the controller interaction... Cya Gaute