I've definitely got to rethink pulling the steering wheel, it takes too long to reach for the horn button.

Another minor issue: the voltage drop when starting will cause the radio to drop out, loose its Bluetooth link and reboot. Besides the obvious, start the car BEFORE I turn on the radio, I was thinking of adding a small battery or a large capacitor in line with the radio, and putting a diode in series to prevent the battery from discharging into the system. Anyone done something like this?