Storyboard with TabViewController in OS X Application - Master Data Array Controllers in Each Scene?

I am testing Swift / XCode6 and the new Storyboard feature for OS X. So far, everything works with one tab controller of three tab scenes, and all three of them connect to the master data through cocoa bindings and array controllers. Is there an official way to create one array controller per entity in each scene, or is there a simpler or perhaps more efficient and better way where I create them once and then point to them? Similar to what I do with my ObjectContext managed object, which is instantiated once in the AppDelegate and then referenced by various view controllers.