VIN number assignment - When?

You can get a VIN assigned earlier, but the system isn't perfect.

I had no schedule and no VIN a week or so ago, and then I got a VIN and a schedule of 10/11 (build this week) over this weekend. I now have an ETA of 11/2.

So you can get a VIN very late and still accelerate right to a build. YMMV.