I suffered a momentary lapse of reason last week and bought a Shaper and Milling Machine on eBay. Not that expensive, and they turned out to be about as small an example of each that you can get. The Shaper is a Perfecto and the Mill a Henri Hauser, which turned out to be a clockmakers machine. Anyway, I now need a workbench on which to mount them. The frame isn’t a problem, I can soon knock something up with box and/or angle, but what is best for the top, a sheet of steel about 3mm thick, or circa 50mm thick wooden planks?