Success! I did it with the bike on its side stand. Just removed the muffler and did it all by hand. Used a lot of grease on the drill bit and tap. Flushed it out with 2gal. Of cheap oil from the shop. Came out better than new. Real easy. By keeping the bike upright any debris stays around the hole making it easier to clean out. I then reconditioned the muffler with a bead blast and high temp stove paint. Looks like new. I am selling the kit for $80. It has 4 more inserts to use.