I've watched Blackie's entire series on percussion revolvers (probably 150+ videos) and in fact it's what got me into black powder so I credit him for that. It's fun to hear him talk about these old guns and I like his southern accent. Maybe not everything he says is 100% accurate but he does know a lot. Most importantly, he never does or recommends anything unsafe. Mostly he shares what he knows about the history, how he makes small modifications, antiques some of them, cleaning, breakdowns, etc... I've never heard him claim to be a gunsmith or expert or anything like that. As far as using files or a Dremel, I've only seen him use that to make small notches in a hammer. It's an informative series that is very helpful to new shooters, and in my opinion nothing he says will steer anyone wrong, get them hurt, or make them screw up their gun.