straightening this neck

[calcuttalowend]

Well i've tightened the truss rod here about a full turn of the allen key - its showing resistance to go any further -, but i still see noticeable neck bend and the action is as shown below; any advice?
(bridge saddles are lowest)

[Jim Carr]

Is this a Fender neck? How old? What gauge strings?

[calcuttalowend]

haha no actually its a local made - maple neck. picked it up about 8-9 months ago; dunno how long it was in the store before that, but a few months atleast. standard gauge 045W 065W 080W 105W strings. um yeah..

[Jim Carr]

try light gauge strings.

[Ric5]

Bolt on a new neck.

[calcuttalowend]

so no way back for this baby?

[ehque]

Resistance... well, hard to define that. If the nut still turns, you still can go, as long as you're careful not to force it (if you can turn the wrench with one finger, you're probably still good to go)

Go slow, let the neck settle into each tuning after 1/4 or 1/2 a turn. Some necks take longer to settle than others.

[xaxxat]

Try Dan Erlewine's method: http://www.youtube.com/watch?v=e2HGn7c9_uo

Just be very patient and gentle. I've used the method to straighten 2 necks.

[JLS]

Originally Posted by xaxxat

Try Dan Erlewine's method: http://www.youtube.com/watch?v=e2HGn7c9_uo

Just be very patient and gentle. I've used the method to straighten 2 necks.

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I don't find it necessary to loosen the strings, to do this, and in fact feel that it's a more real-world method, to backclamp with the strings at pitch.
With a problem neck, backclamping is a given--I DON'T want to force-tighten the rod, against both the string tension, and the set of the wood.

[GlennW]

It sounds like your TR nut might be at the end of the thread on the rod. Remove the nut, put two or three washers over the rod, reinstall TR nut and tighten. If that allows you to achieve an acceptable relief and your strings are still too high, remove the neck and a piece of an old credit card or business card between the end of the neck pocket and the screw holes (about 2 1/2" x 5/16"), reinstall neck, etc.

From the looks of things I'd try the shim first.

[Trauma Boy]

give the neck a day or two to set, you should only turn it a quarter at a time