I will eventually pick up from Springfield. Hopefully different experience as that’s kind of silly and petty. Usual Dealer practice is a) go over the car and instructions. b) then Pay and sign docs. c) then get lectured on insurance and warranty (like a time share).
"The paperwork" for buying a tesla is a few pages. The MVPA is surprisingly easy to understand, not at all like the triplicate paperwork that a traditional dealer prints out, that many times has "errors" in it (that surprisingly are NEVER EVER EVER in your favor).
I dont work for tesla (not even close) and I am just another person online, but I would suggest that Tesla's policy is to not unlock the door to the car until you pay. You can likely get them to bend that policy as long as you are not standing there with what appears to be a long checklist, and / or tools to measure gaps, or having a "I WILL see inside the car before I pay, or else! (let me talk to the manager) type attitude (or picking up shortly after someone tried to pull that).