Gosh, inserting that thin slide of spruce into the crack is some crazy form of art/mastery in guitar building/repair. Always a joy to watch and glad this week's video was an early one too ;)
You're sure right about luthiers breaking all the rules of woodworking. I was trained in cabinet making before I became a luthier, so I was pretty shocked when I saw all the cross grain glue joints. But now I realize it's ok, so long as the humidity is not too extreme, and the braces are able to flex enough. But you're still just buying time. Joint failure is just a matter of time. Nice work!
1:17 I'm not sure if it was you, or if someone else came up with the phrase, or if I arrived at that conclusion building/studying guitar building myself but: An acoustic guitar is a compromise between woodworking and sound. In my head that turned into "Too much woodworking and you get no sound, too much sound and your guitar won't wood."
I recently replaced a warped rosewood bridge on a classical guitar. I tried a method mentioned on an internet forum and dropped the bridge into boiling water. The memory of the bridge shape came back immediately and then i clamped to a marble slab in the kitchen overnight. It was perfect and saved me from buying a new bridge.
The Larrivee 03 Recording Series guitars are one of the best deals out there for an all solid wood, North American made guitar. My first Larrivee was a D-03R that I regret selling to this day. My current pride and joy is a 2010 D-09BZ that I'll never part with. It's an absolute cannon!