Well, I did it. I love my P45, but wanted it a bit smaller for concealed carry. I've "coverted" a CW9 in the past so I had an idea of what I was doing. Still, I hated to mess this fine weapon up.
Took a wee bit at a time, until the mag just snicked in to place, then went a little further to ensure mag seating. Polished the end up with fine wet/dry paper, and buffed it out on the wheel.
Fits my hand like a glove, and shoots just as well as before.
Sure the warranty is gone, but I bought it used and it's well over 5 years old anyway.