Seems like two changes could hit many of the concerns here: (1) The box can unclip from the wall, and disconnect from an internal fixed plug. An emergency pul

Seems like two changes could hit many of the concerns here: (1) The box can unclip from the wall, and disconnect from an internal fixed plug. An emergency pull handle is all you really need. (2) A slow-but-steady retract mechanism. grinich's idea for a small electric winch makes a lot of sense if a spring version couldn't do it slowly and steadily enough. And if you're worried a moron won't listen to your amperage ratings, a built-in breaker. Still, a nice-to-have in the kitchen, workshop, and garage. The electric knife we use at thanksgiving has a uselessly short cord, and nobody remembers to find a good extension until way too late in the evening -- too many other concerns first!