I saw this on a heavy equipment forum and did it today. Took a length of cutting edge and welded it on the bottom back edge of the gp bucket. It protrudes about a inch and and a half towards the machine. Works very good for back dragging and minor smoothing. You can control how aggressive it is with the tilt but it can never gouge too deep. Worked well even on the hard gravel driveway. I put a picture in the photo section under bucket mod, cant seem to get it over here. My bucket has a radius in the back corner so I put it where the flat floor ended. The light area in the picture is the ground.