I went in a bit of a different direction. I had a 40 Edge that I wanted to fit a 9mm barrel to, but was told by a very competent gunsmith that only about 1 in 3 would be successful in the end. So I am building a 9mm slide with the hope that the ejector will not have to be changed everytime. I shoot tactical rifle matches that sometime are caliber specific due to supplied ammo, so I figured it's a bit cheaper than two guns.