Hi n-77…
Thanks for posting this. It's a good reminder. I've been meaning to add one to my repair kit (I do setups and minor adjustments for students & friends).
Before forum-ites jump on us, the truss rod is there and adjustable for a reason.
It is not the only means to adjust your action, but after a proper action setup is accomplished, going into and coming out winter the neck relief is the largest source of guitars getting out of adjustment in our region.
Also, it is an integral part of doing proper setups.
Loved the pictures as well.
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