Cheers boys. I use wood cos I have access to loads for free and I'm in fact using thrice recycled material (they started off as backdrops in a well known stores windows, were donated and used in school projects and finally end up as a space station!). It's funny in these days of resin/plastics, smart materials and 3D printers that traditional materials like woods get passed by but it's still a cheap, robust and flexible medium to work in.