UPDATE!
The filing is close enough to done for me, later, when I have more and higher quality tools I will make it look real pretty, for now the 600 sandpaper is a good enough finish. I removed a good amount of the slide stop, to the point that I think disassembly without a cylindrical tool, like the retractible pen I have been using, may be impossible. No big deal, pens are in good supply up here. It carries like a whole new rig, I love it. It no longer digs me just for kicks, and it doesn't wave grotesquesly from under my shirt, betraying my carry status to the whole world. I love it, and the 97B is up next.