OK I figured it out. Tesla will provide a free return shipping label. I am returning them because the allow wheels show too much of the inner wheel for my taste. Also, the wheel nut caps are not very secure. The last reason is that I want to keep my car in the configuration it was delivered. Attached is a picture of the Aero Wheel Kit installed.
I ordered mine a couple weeks ago and had them in my hands in 4 days so great job Tesla. As for the staying on I do not see it being an issue. That is why they provide a tool and the center cap I actually had to use my phone mount suction cup.
Overall I would say it's a great product and look.