I have a newer Fender Jazz 5-string with a very bowed neck (forward), even with the truss rod tightened all the way. I'm going to try adding washers, as I've read here. Unfortunately, I can't get the nut off no matter how I try. I've loosened it all the way, there's no resistance and it rattles around, but it won't come out. I tried prying it out with the allen key and I even removed some material from around the hole! The threads seem fine, I can tighten it back. And the nut isn't stripped on the inside. What am I missing? Thanks!