Kevin I broke a dozen blades making those. No jig was used other than a zero clearance insert to support the letters as they were cut. I did not waste any either. I set my saw ( DW788 ) about 4 on the tension and about 4 on the speed and took my time. The reason most of the blades broke is I got impatient a time or three. I had my magnifying headset on of course. Not really all that hard, just a bit of practice.
DW