Does anyone know how the steering wheel senses whether you are holding the wheel or not? I have received the "Hold Steering Wheel" warning a few times on autopilot WHILE I AM HOLDING THE WHEEL. What am I doing wrong to fool the wheel into thinking I'm not holding it? On another note, is there a listing somewhere of planned supercharger locations and expected completion time? I tried to search on a few different websites (including Tesla's) without finding a comprehensive list with ETA.