I have a few pistols I want to put night sights on and am looking for advice on how I should procedd with this. I have seen a general sight pushing tool from Brownells that looks like it holds the slide in place and has a screw adjustment for drifting the sight out. I have also seen where some people use a nylon punch and a hammer. The guns I am doing are a glock 27, a 1911, and an H&K USPc 45. Anybody have some advice?