Thanks! Yeah, I use a simple electric engraver that works basically like a micro jackhammer. A while ago I got an idea of engraving my initials on my GECs' shields. Firstly, because I heard that's what those shields are there for. Secondly, because I love GEC knives, they are aesthetically perfect traditionals for me, hence I wanted to protect them from being occasionally sold (by myself) due to any clouding of reason of some sort. Lastly, it also makes them potentially a less desirable objects for stealing. And maybe a little bit of self-pride has to do something with it too.
P.S.: an occasional fun of engraving ornaments and such on plain-metal handles of modern folders occurs as well. If GEC shield is big enough I usually add a simple ornament there too, but I really wish I didn't, on some of them.