Re: Rich's Setup
Of course a guitar can be setup to any player spec the specs of the guitar will allow. That IS the job of the tech, to make sure it can be. Within reason, if you want to make big bends on a 7 1/2" radius board with super low action the specs of the guitar will not allow it.
My personal [current] favorite low setup is 1.5mm even at the last fret, relief around .2mm, but i'll use relief to control in between first fret action. .1mm is the thinnest nut shim and can be too much [too high with, too much buzz without], which can be corrected with a hair more or less of neck relief. If I'm asked for something specific in relief then the nut will have to sit the hair too high or low, typically I'll let what the player has told me about style determine which way it will go.