Hi guys! I'm currently working on a Fender Jazzmaster, that a friend asked me to take a look at, and give a proper set-up. I got the guitar home, started doing my usual measuring, taking notes, etc. I came to measuring the neck relief, when I discovered that there was quite a bit of relief in the neck. I used my feeler gauges to measure the relief. I could stack feeler gauges under there, adding up to .040" in relief... It looked real crazy.. The action on the guitar was set REAL high... of course, it had to, given that neck relief.. I then continued and took off the strings, to take a closer look at the truss rod, in order to bring down the neck relief. Normally I shoot for .012" or .010" in relief. I made sure the truss rod was able to loosen and tighten, and it was. I then began to tighten the rod a little, in order to take out the amount of relief. I tightened the rod, gave it a couple of minutes, and went back to check the relief... Nothing had happened.. I went back, adjusted it again, gave it time, came back.. still nothing had happened.. I can't get that big amount of relief out?! What going on with this neck?? I did a little searching on the web, found some people saying I could clamp the neck down, in order to take out the relief.. I haven't done that, and I'm not sure I want to - since I haven't done it before, but I want to know a little about it.. In case it turns out I can do it myself... How would I do it? What would I need? What about the frets on the neck? Will they start to lift up, and cause problems? Thanks, everyone! I'm a little puzzled here.. Cheers!