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If you turn the truss rod and nothing happens, the trouble could be have been built into the neck at the factory. The time to avoid it is when you glue the fingerboard on. Dan Erlewine shows how to fix this problem before it happens.
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For more information on tools and parts:
Behlen Ground Hide Glue
http://www.stewmac.com/0669.html
Precision Straightedge
http://www.stewmac.com/3850.html
Hot Rod Truss Rod
http://www.stewmac.com/2552.html
Guitar Player Repair Guide
http://www.stewmac.com/0570.html
Neck Relief Gauge
http://www.stewmac.com/2004.html
Scissor Jack
http://www.stewmac.com/0490.html