The Model Y design and manufacturing is improving: Elon Musk told interviewer that the Berlin made Model Y is "not just a copy of the Model Y. It’s actually a radical redesign of the core technology of building a car.".[33] On August 13, 2020 it was reported that Tesla Fremont will soon activate the World’s largest unibody casting machine in Model Y production, switching to casting the rear body in a single piece.[34] Made in Berlin Model Y, rear and front portions of the frame will be a single-cast design. Injecting molten aluminum into a cast and having robots pull out the molded metal allows Tesla to combine several manufacturing steps.[35] This manufacturing process is expected to result in significant savings, including lower tool investments, reduced production time, lower number of robots and smaller production area.[36]