I am wanting to create food and population related starbase modules but I don't want to overload the economic ring with them if I don't have to. Basically I want to have a food ring and a population ring - that part I know how to do. I can either make them generic rings that preclude the other ring types or make them a subring of the economic ring and have them preclude the other manufacturing, research, wealth, morale, and trade modules making it still dedicated to being food or population only. My problem is how to get the AI to use them. Since the AIStarbaseGovernorDefs.xml file looks to be a build list without weights, I see no way to have it build a specialized food (or population) starbase. Am I missing something? 

In a related question, again looking at the AIStarbaseGovernorDefs.xml, does the <DontRequestConstructor>true</DontRequestConstructor> that is used for the majority of the military modules mean the AI won't build them at all? If not, what does the boolean indicate? Thanks!