I think I just made a huge mistake. I bought a set of 21" wheels today. I planned to use those during my normal weekly commute and change over to the 19" wheels for long out of town weekend trips. I was under the impression from this article and video: Tesla Winter Wheel Swap and TPMS Reset - TESLARATI.com that pairing or swapping TPMS sets was a DIY procedure with the "Reset Sensor" button. But reading the manual carefully, it clearly says that the Reset Sensor button is not for replacing sensors but for replacing wheels while keeping the same sensors. But I've seen other references to folks buying TPMS sensors from Tire Rack and following some song and dance procedure to do their own pairing without actually spelling out the song and dance. On my Toyota and Lexus, I can use my Techstream or ATEQ quickset to replace and reprogram sensors or to swap sets. Does the Model S not support two sets of sensors? Please say it isn't so.