My experience is the following. I discussed about downgrading with the inside Delivery Advisor who managed my case( this person writes to me in a unprofessional manner throughout all our exchanges). Anyway, he said it's possible and will be looking into the changes/price difference and I asked him to do so and to make the downgrade. Ok, so delivery date came and the information was not relayed to the delivery centre. So, when I brought it up the senior at the centre questioned me why i waited now to mention it. Rudeness aside, I confirmed with her that I will indeed be able to downgrade before picking up my car. My mistake was not delicining the delivery and wait until actually gave me the refund first but I had trust in Tesla. My delivery specialist( someone else) is very nice and followed up with me very responsively. He said he would submit a case for me(Did not happen) However, I got caught in a loop where I was told I had to follow up my case with the customer support line and the customer support line would tell me to go talk to the delivery centre. I really don't like Tesla's business practices, they shouldn't claim what they will do when they won't do it. I would've happily waited for the standard model 3 since I haven't picked up my car when I got wind of this announcement.