Now that the sidewall has been cut back there can be a noticeable ‘top edge’ on the side angle just below the start of the sidewall of the ski. If you want optimum drag reducing performance this top edge can be blended in to the side wall by using a seven degree side edge file guide & a file. A couple of passes with the file is all that’s needed to blend in the top of the edge – remember you’re not setting the whole edge to seven degrees! Follow up the file work with a few grades of stone to smooth out the file striations & polish the edge.