@jen: a cart like that is certainly possible.

as for terrain, as i said before we don't have to worry about that - holland is one of the flattest countries in the world and we are at the moment building on a square of 250x250 metres which is hardly half filled. apart from some bumps in the road we can forget about that. - somewhere in the very first part of the thread in posted a photo of the real town we took as an example.

"The light at the end of the tunnel may be an oncoming train"