Re: headlight dimmer, I have found that this device is most excellent ! It reacts faster than my foot as far as dimming the lights when oncoming traffic approaches... and it never forgets to do so. It works extremely well. The only time I have to use the foot dimmer to over-ride it is when approaching another car from the rear.... then, the dimmer does not recognize that there is a vehicle in front of me. One curious / funny dimmer-related story... I was approaching the 4-way intersection near my home, late one night, when my headlights began flashing back and forth, between high and low beam, continually.... this completely unnerved me until I realized that the headlight dimmer was "seeing" the flashing yellow "caution" light at the intersection, about 1/4 mile away, and acting on the headlights accordingly ! 300'ly John Hertog