The triangle file was for scoring on the marked points, It was marked out really well with 5mm from E and G to the edge of the fret board then pretty much eyed in the 2 centre strings, just went a little too deep with the triangle file I really didn't expect it to cut in that quickly, I'm a bit heavy handed, but lesson learnt, I will take you advice and try again using the flat file and be a little more less heavy handed. Thanks Simon.