I thought this was an interesting interview about gunsmiths in the 18th century.
Townsend's does some really great videos of 18th century living in general. They're also an awesome company to deal with; most of my Continental uniform came from them, and they had to tailor made for me, including the rabbit-fur felt hat, in under 10 weeks.
Glad to hear they're the real deal. I enjoy keeping up with their YouTube channel.