I just bought a set of Big Dot sights for my G19 and the post on the front sight (that goes into the oval shaped hole on the slide) seems to be too big. It just won't go in. I've tried tapping on the sight with a rubber mallet but I'm afraid to hit too hard for fear of damaging the tritium capsule inside. All the installation videos I've watched, the people seem to just drop the sight right in there but that just isn't going to happen with these. I've thought about taking a small file and running it around the post to slim it down, but I'm not sure if that would void my warranty or not. Anyone have any suggestions? I've already emailed XS and am waiting on a reply but I thought I'd see if any of you had a similar experience.