I have a custom `ViewController` that is meant to be reusable, and an arbitrary number of instances will be chained together in a `NavigationController` in Storyboard, all sharing the same model as a delegate. 

The `ViewController`s need to tell the model which instance they are. Currently, they have an int property that they get from the segue, but it doesn't seem very idiomatic and doesn't lend itself to having multiple instances onscreen (for iPad). I figure there's got to be a cleaner way to do this, so does anyone know what it is? Thanks.

RESULT: self.view.tag