I saw this beastie on Stand C the Bowman Circle yesterday at Exeter Show. I have to say that I was somewhat transfixed by it as it perambulated around the layout. Definitely out of the box thinking by the maker. What a little corker, and it appears to run well too. Short Vid after the Pic.
Vid,
http://www.youtube.com/watch?v=BshITdeVblY
JonD
Vid,
http://www.youtube.com/watch?v=BshITdeVblY
JonD