I was at Thunderhill today and saw a Tesla M3 Performance at the track. While they have 240 V available charging is painfully slow with the stock charging cord. We need Superchargers at all NorCal tracks. He was running pretty quick and lasted the first session with no issues. He ran the second session too but there are no superchargers close to the track so he needed to charge the rest of the afternoon so he could make it home.