I have owned many Fender basses, from custom shop to mij. I am particularly sensitive to setup and prefer a nearly flat neck. Several just could not achieve this and I compromised by using strings with less tension, DR sunbeam 100s seem ideal for this. Occasionally I will find a neck that is absolutely stable, my roasted neck custom shop 64 jazz being one, a Sadowsky another. The neck on my genuine 63 jazz feels great but I know the relief will not go to heavier tension strings. I even once had Fender tell me to allow two years for an MIA neck to settle before they would replace it. The two most practical lessons I have learned over the years have been to clamp or hold the neck into a slight backbow before tightening the truss rod and the benefit of adding a couple of washers if the truss rod seems maxed out.
