If you want your guns to look right, get the Hershel House videos, or the Jack Brooks videos. If you get the engraving books you will wind up with a longrifle that is way overdone and looks like a rodeo buckle. Good basic engraving is about as good as you could get on a longrifle. There were a couple of gunsmiths with superior skills, but they were not the norm. Some gunsmiths from the period were notorious for they’re poor engraving like Dickert.
Hungry Horse