Truss rod nut won't come off!

[Know1]

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!

[ashtray]

Does it have a dual flex truss rod? I thought I read somewhere that the newer Fenders did... or maybe that was just the American series. Dunno.

[Know1]

It's a standard truss rod as far as I know.

Does anyone know where I might find a drawing or schematic of a truss rod system for this bass?