MIMF

I think these were worth the watch, even if you don't build guitars. These 2 videos are a little old (from around 2007), but the concepts and methods here are very current. quarter grain and medullary rays are explained very well, and check out how that helicopter picks up wood from the forest floor! Looks kinda dicey!

https://www.youtube.com/watch?v=5EpVIEyYiSs
https://www.youtube.com/watch?v=1DTY2bUoxwo