Topic: Erlewine Neck Jig
Just watched this 5 1/2 minute video a couple times, and found it fascinating. Getting the neck & frets at just the perfect place can make or break how a guitar plays. Fret buzz, dead notes, inconsistent action, etc. are all things that affect how well a guitar plays. This device is pretty cool, and a luthier who uses something like this has a better chance at getting it perfect:
https://www.youtube.com/watch?v=uRq8B30kb1I
Thought some of you might find this interesting.