version 1 Quite tricky to build/match the axes; cable way could be obstructed
version 2 Cute, yet impossible to build (from my pov)
version 3 What's to say? I built that one. The only difference between this one and the final version is the way the camera is attached. I'd been thinking a lot about it when I came across that funny thing which was supposed to be used with the steadycam.. it works fine!
Remote control unit:
version 1 The way to go.
version 2 Very nice (see Jimmy Jib), yet too difficult to build (and if built by me, too clumsy)