I'm posting here in case anyone else can answer my question as well. The metal mag release showed up today. Fitting to the grip was easy, but the mag does not quite catch when fully inserted. I am looking for advice on how to fix this. My thought was to sand down the bottom of the grip a tiny amount. I am worried this could cause problems up top if the mag is too close to the slide. So, should I sand on the catch or the grip? Thanks Dylan edit: I also have a +1 on the mag. File it down instead?