If you mean anywhere near correctly, very recently. My first attempt was 1977. It was a dismal failure, but equall to some original LR's I've seen. There was not enough info available then, without going to a formal school for it. I did a couple of small pieces afterwards that where a bit better, then no more until a few years ago, when I built my second longrifle. The engraving was not that great then either, but much improved. I gave up the push graver, and went to hammer and chisle. That was like night and day for me. About three years ago I did another longrifle, then a yeager, and did much better after watching tapes from Lynton McKenzie. That is pretty much it until I started this project. I still have a ways to go. I do not consider my work all that good, just good enough for 18th c. America, and early 19th c. If you were ever able to see a Ron Ehlert gun up close, you would see the difference. That man was a real engraver. Once you kinda get the hang of the tools, design becomes one of the hardest areas to master.