From Tesla:
Thank you for contacting the Tesla Online Shop team, we are happy to help with this request. We have submitted the request to have the price difference refunded back to the original payment method. Please allow 3-5 business days for your refund to reflect on your account.
Thank you for supporting Tesla's mission to accelerate the world's transition to sustainable energy.
Regards,
Tom | Online Orders | North America
I did twice. Once for the adjustment from $550 to $495 and now to $400. YAY!