well, here is one that SongBob knows...maybe he had some part in it...*grin*...it was built long ago by a local guy who has been twisting it's tail ever since

http://users.starpower.net/extree/P5060526.JPG

it actually sort of works part of the time, but these things take a lot of tweaking to stay usable.

That this one has survived is a tribute to the GREAT forebearance shown by various locals...*wink*