Here are some highlights of last weekend's track day at Arizona Motorsports Park. Both kinds of tires I like to drive were on national backorder so I settled for Kumho XS, which were fun and durable but they sure like to talk at the limit, and they were a solid 2 seconds slower per lap than the Hankook RS3's I prefer, or NT01's that are even better. It starts with a dust storm caused by a spinning Cayman and ends with an M3 spinning and coming across the track on two of us. In between is a black E36 M3 with stock engine and suspension but stripped interior and sticky R-compound tires. We harrassed each other for quite some time, that was entertaining. That's followed by a silver E90 M3 whose driver I've been coaching a little bit. Then some randoms.