While I cannot give you specifics on the line and machinery, what I can say is that they are indeed installing the equipment and working around the clock on it. It was a beehive of activity when I was there!! I saw the "Alien dreadnought" with my own eyes and the name is very apt: it's massive and complicated. I have a feeling this new thing will be shrouded from public eyes as long as they can, I think they feel it's a trade secret. If you want an idea of what it looks like take a look at this picture of a particular station on the Model X line. Some 15 robots in this station alone but the Model 3 line looks about twice as dense everywhere.