DESCRIPTION:
If the action on a bolt-on neck guitar is a bit too high at the top frets, then a small shim in the neck pocket is a good way to adjust the angle of the neck and bring the action down. (This isn't the same as a truss rod adjustment, which fixes problems where there's a crown or a bow in the neck).

It's a fairly straight foward job, and this video shows you how it;s done.

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