Triangular file

grabcad

I needed a triangular file for a project at work but didn't find one here so I've model it. Since it was for illustration purposes the dimensions aren't accurate.It took me a lot of efforts to model the slightly tapered end. Didn't get any luck with curve driven pattern nor with the circular one. So I had to cut and use linear pattern for each side. Would be happy if someone has any suggestions for improvement.