I would like to power the clock with the minute hand that rotates clockwise. The hour dial is "clicked" in a counter clockwise direction each time the minute hand comes around to strike a post. The hour dial will need to "lurch" forward 30 degrees and stop each time the minute hand moves the dial. I don't know how to achieve this without using some kind of spring loaded ratchet mechanism. Also, friction between minute hand and post needs to be addressed. So this may be a lot more challenging than we can handle.