Sounds like you're well on your way! Interesting approach on the magazines. Hopefully you can figure something out that looks a bit more factory than my setup, though the STI mag that I'm using drops free really nicely, like stock. I just put another 100 rounds through my gun over the weekend with no issues, although I don't count the failure to hold the slide open as an issue. Even tried some 155gr Hornady with zero malfunctions. The gun handles it beautifully and is super fun with the 10mm cartridge.