Cheers Ritchie. Just went and bought a sheet of Medite MR. It's a much denser board and not that much more expensive £26 per 8x4 sheet. Thinking about the speed I pass the piece with manual router it's an awful lot slower than the cnc. So with denser mdf and slower feed speed I will hopefully get the result I am looking for. Will let you know how I get on. Steven