Back plate, back joint

I imagine for younger folk, it’s inconceivable to imagine a world without the WWW. When I first started out, I devoured as many guitar making books as I could find. Amanda, then girl-friend, worked for a publishing house, so when in 1976, I wanted a copy of David Russell Young’s book she wrote to the American publisher, waited for a letter to come back with the cost etc, bought an international money order, posted it to the States and waited…………….
Like many, I still like a physical book and have quite a lutherie library but sometimes descriptions of making techniques can be a bit lacking. Try, for example, looking up, in one of the definitive books, “how to join an archtop back plate together.” Wouldn’t it be easier to look at a video on YouTube?

And here’s the aforementioned back fully carved……….