I removed the neck on one of my guitars to find 2 peices of a buisness card stuck in the pocket as a shim.
The tech who set it up before I got it felt that a straight neck with a shim was better than a neck with some bow in it.
The truss rod adjustments need to be done with the neck off so granted it is a pain in the ass.
Since a tight neck pocket and neck to body contact are critical,wouldn't a shim kill some sustain?,or is it common practice to do this?.
Any way I took them out and will loosen up the truss rod a little and lower the action and see what happens.