Was this the paper that made Feynman the father of "nanotechnology"? This paper's spirit reminds me of Leonardo Da Vinci's futuristic drawings. Incredible that this was written in 1959. I keep thinking to myself when reading this -- only if Feynman was around to see AFM and STM. I think those were created just before he died. I wish he had more time to play around with those, he probably would have loved them. Feynman had truly a deep imagination.

I intended the arm-on-an-arm expression to be conceptual imagery, more so in-line with your link, less with OP article. What do you mean by "some functional versions" of this? Please link!