Not enough LEDs for my advanced age - I think automatic transmissions are easier to understand if you dismember (oh, dismantle) and reassemble a few internal-gear bicycle hubs. Actually, now that I think of it I could copy the art-idea that started the thread - but then it is only derivative rather than original - and sort of pointless at that point. The first time I saw the original series of images I was most struck by the typewriter bits - sort of 'french curves' for drawing schematics.