I was making a base for a barn and wanted to block the floor joists. A 2.75 x 3.5 deep hole was required and the circular saw only goes 2.25 inches deep. I was able to cut out most of this with a circular saw and then make a template out of 1/4 MDF and some strips of oak that I had. to the beam and finished the score and cleaned the sides. Worked great with my Dewalt 618. No vibrations or oddities that I noticed. Trimmed 30-40 notches and the supply seems good and still sharp.