Sorry to ask a question that probably gets asked a lot, but I have done some research and I'm not totally clear on the results. I was going to buy the Tesla store wheels/tires combo and have them delivered to a SC and then make an appt for install. However, my SC is an hour away and the coordinating of the order, delivery and SC appointment make me want to order wheels somewhere else, have them delivered to my house, buy tires from my local tire store and have them mounted and installed there. Is there any reason to be cautious about doing it this way ? They said they have done this with Tesla's in the past. Still don't know whether to get 19s or 21s. I live in Colorado and will be getting full on snow tires.