Saga continues, dropped car Thurs (the planned loaner option disappeared Thurs afternoon, so I got an Enterprise car), and was told probably not Fri (the original date), but no problem by Sat.
Got a call today, the kits have been revised, but they don't know any specifics.
I asked about bolts, SC was not sure.
They checked with Tesla, and yeah, bolts.
So I was given the option to get my car back today and bring it back in later, or bring the Enterprise in on Sat and get a new Tesla loaner and hopefully pick up my upgraded car on Monday.
I took the later option.
We'll see.