My experience with roll pins even when using the correct size roll pin punch to install and remove has not been completely positive. I was taught they have a one time use, i.e., take one out, replace with a new. That being the case, I am curious why HK in particular uses a roll pin to secure the grip panel (I have a P2000) vs. a solid polymer or metal pin like Glock and other gun makers. I really like my new P2000 but I noticed after firing the first 150 rounds the grip panel roll pin was walking a little, no big deal but still, we're talking HK here . I hope it's the roll pin and not the hole in the grip panel being slightly out of spec. The good thing is that roll pins are cheap and I intend to try a new one. Worse case scenario, I try a new grip panel. Any thoughts? This is not a ding against HK per se, I am just trying to learn as much about my new gun as possible. Thanks.