I'm looking to put some tritium night sights on my 92fs and I don't want those slip over ones (as I've made some kydex holsters that would probably not have enough clearance). I also don't want to send off the slide and pay $150 to have it done. I'd also like to avoid doing a beavertail, if at all possible. Therefore I'm left with the question of how the installers manage to drill it out. Only way I can imagine is direclty on the hole with a really long shank bit, or trying to drill it from the back side. Any ideas? This is purely a thought exercise at this point, as I don't even have a drill press at this point. I just have a problem where I look at things and wonder how it's done, lol.