By request: ****attempt at your own risk, results may vary.****** make sure the guns unloaded etc, I wont explain everything so use common sense. If youve got a question, I will answer it though. I used: a drill, a good assortment of bits, a dremel, a diamond engraving bit, 1 polishing bit, cold blue, 1 fmj bullet, 1 dowel,a towel, a hammer, lots of patience, a steady hand, and a good eye. I started by measuring and centering up 2 dots on each side where my original 2 holes would be. I ended up connecting them to form 2 ovals. I think I may have made the ports a little larger than they need to be but they work fine for me so i dont mind. this is how i did my ports, if you want a different shape, modify as you see fit. 1. using the dowel and hammer drive the FMJ bullet into the area of the barrel you'll be working. This will help elim. burrs and prevent the bit from striking the opposite end of the barrel. 2. place the slide and barrel w/ the recoil spring still installed on a folded towel and use the smallest bit to drill each marked hole thru the slide and barrel. the bit had a little trouble making it thru the barrel on the 3rd and 4th hole so i removed the barrel after it was sufficiently marked by the bit and finished on the barrel only. 3. repeat the drilling w/ larger bits until the holes are the size you want. Use 2 sizes larger on the slide than on the barrel. 4. remove the barrel from the slide and use the diamond dremel bit to connect the holes. then round the edges on the barrel to prevent bullets from being scraped by sharp edges. 5. use the dremels polishing bit to pretty everything up then cold blue the slide and/or barrel. Ive polished more flaws out since the last picture, ill try and get a new picture up soon.