Any changes made to your existing order (unless it’s changing the payment option AFTER you’ve already received a VIN), will bump you to the end of the lime in the waiting queue. And that doesn’t include any change fees or price adjustments that would also be made.

As for switching to a Performance, it’ll be like putting in a new order right now but talk to your SA to see what they can do about the $250 order deposit, and see if they can just re-use your existing $100 order deposit from your current order. Also, the Perf cars already have a much sooner EDD, so it should get delivered in 4-5 weeks instead of waiting 4-5 months on the LR order.