looking for a link about ball rolling thing

[happymark]

sorry for the stupid request. I have bad memory

I remember there was a post about a design for rolling ball.

basically it has several modular and can be connected together to make a interesting track to let ball

roll and sometime do some loop the loop thing.

anybody can point me the link?

Thanks in advanced!,

Mark

[Darth Dino]

Hi

it is G B C,great ball contraption.

Dino