The image I posted is from a well noted graphic artist from Scifi-Meshes.com, who looked at all references online, saw the movie repeatable, and used TobiasRicher's 3D model (who also did hows of research to arrive at his final model).
And seeing as how the EA one was made before even a full view of the Enterprise was available, almost ANYONE'S schematic of it would probably be fmore detailed than the EA one.
Oh, and the EAS one just uses the refit saucer, however now we can clearly tell it's not that one.
In fact, it looks like the saucer itself is four decks thick at the edge, unlike the refit.