Noticed the change to include payment just after I received a call from Las Vegas that set up original delivery date. Since I was paying with cash I didn't finish the form. As it turns out, it took nearly two weeks to get the car from Joliet, IL, (railway drop point) to Westmont, IL, (the delivery center). I was concerned (getting a cashier's check) about the twice-delayed delivery date but on the last call for delivery appointment I asked about using a personal check (and having final bill emailed to me). That turned out to be okay - saved time and a few bucks.
Got my car about a month ago - really great! It's been fun to drive. And watch for the occasional stare as to what it is. I was extremely worried about fit & finish but only have one minor issue (charge port door not sitting flush) that I hope to get 'fixed' soon.