And any lawyer who wasn't bottom of his graduating class will say they it's a one time upgrade, tied to that VIN, in the same way that an upgraded interior or l

And any lawyer who wasn't bottom of his graduating class will say they it's a one time upgrade, tied to that VIN, in the same way that an upgraded interior or larger set of wheels is. If this optional upgrade can be renegotiated at time of future sale, then any and all other upgrades must necessarily be renegotiable too. I don't think Tesla wants to have to replace interiors every time someone resells a vehicle.