Tomorrow, I am heading down to IL to possibly take delivery of a 2015 model S. At the risk of being flamed , can I ask some noob questions: 1) I think this vehicle has the staggered 21s, but a buddy of mine has some 19s that came off his 2015 p85d. I am assuming I can swap those out without any issue. I don't think I want 21s in Wisconsin. 2) Are there things in particular that I should pay extra close attention to during the examination of the car (i.e. are there lessons learned or things you wish would have done differently)? I know the car has two new rear tires, replaced back plates on the door handles. The current wheels have rim rash, and the skull cap on the mirror needs to be repaired. Thanks for the advice!