 This particular teardown company has been analyzing the 2021 and 22 Model Y bodies in white stripped to the bone. Though the exterior appearance of Tesla's top-selling car changed a little during the period, Tesla is still investing in it over these three model years. I'll give you an example. In 2020, the Model Y used a two-piece casting in the rear. That's a metal casting. A year later, that casting was achieved as a single piece.