Ah, but the remote is integrated in the car. And when we take the tandem from home we have a yellow sign that hangs down when the door is opened. The problem is when we pick up the tandem from somewhere else ... here we use a bright orange ankle bracelet we place in a conspicuous spot in the car. Alas, not this time.
TandemGeek, yes indeed. I'm going to ask my LBS to give it a thorough looking over. I looked it over really good and it handled perfectly this weekend but I'm a fanatic and I will check.