Thanks! Yeah, the hardest part for me was getting the center punch to stay on target. Since these sights are small, I just eyeballed it but it may help to maybe use a vise for the front sight since it was really tough holding it and getting that spring loaded center punch to make its dimple. If I did it over again, I would use something really sharp; like the tip of a drywall screw to get the dimple started on the front sight since the plastic is a little slick. The rear was no problem - just lay it on a flat surface and punch away.