It just occurred to me: There are different types of MDF. I'm used to the brown-coloured ones, but the boards Davidsons cut for me were very light in colour and almost paper-like in quality. They also seemed a bit lighter than brown MDF (but this might simply be because they had already been cut). Do check it out before you buy. I would like to hear another opinion. They also have other branches; I'm not sure if the others (beside Ottery) do CNC.