Hi BurrMan

Many thanks for your input - Trying to create the surface just as an art manufacturing exercise I would like to make it up out of a steel band - trying to get my head around the forces required Ill try making a light gauge aluminium prototype and advance up the food chain - get a real world feel for what the material will allow rather than paper. Its put a twist in mind as to solving a simple real world exercise and transition that into a working computer model. Will post up some results once I do some analogue trials.

Thanks Alex.