[remram]

Do you mean that it should be distributed with it, or that it should write it in there when it downloads it at runtime?

[Angostura]

The latter. A model update would then just be an application update. To answer my own question - if they want to allow a choice of downloadable models, then Application Support is the perfect place.

[Reason077]

And also to allow updating the app independently of the model, without a 4GB download every time.