I don't know anything about distribution, supply chain management, or how to run a company. But there are examples from other companies that I can compare it to and feel like that's a good place to start. Currently, there are about 84 possible configurations give or take of the Model 3 (not including SR). When you remove the Performance option that number goes down to 56. Based on the huge amount of configurations they received on and after 6/28, including the previous orders they had already received up to that point, I image then can produce a model of what the demand per configuration is. And since they're now producing 800 or so cars a day, they can move X number of cars to separate distribution centers across the country. Amazon runs that same kind of idea. I live in LA and there are items that I can receive within 2 hours. But i've tried to send that same item to my dad who lives in rural Texas and it won't even qualify for the Prime 2 day free shipping because it isn't in a hub that can get to him as fast. They have large hubs that stock stuff in specific location across the country for quick shipping. I think this is what Tesla is now doing with the Model 3. As they're coming off the line or traveling across the country, they then get matched to buyers. That's why the Vin to delivery window is so small. I definitely don't think they're manufacturing the Model 3 the way they'd create an X if you bought one right now. They would build that X specifically for you from beginning to end. But like I said, I have no knowledge of distribution or manufacturing at all as I am a film editor, but after analyzing the data in the various spread sheets this is the conclusion I've come to. But maybe I'm full of it, who knows!