zenguitar wrote:Totally slacken the truss rod, ideally removing the nut/adjuster (it also gives you the opportunity to give it a clean and get some fresh oil on the thread so it works smoother when you re-assemble).
You need a good flat surface, a couple of good clamps and a spacer 3 or 4 mm thick. Lay the guitar fretboard down on the flat surface with the spacer between the fretboard and the flat surface beside the 7th fret. Then clamp at the nut and heel, taking care to apply clamping pressure slowly. Sight from the nut towards the heel regularly as you tighten up until you see a slight forward bow. Leave it overnight to settle.
With luck, when you release the clamps the following day the forward bow will have set. If it returns to a back bow, it is worth going through the same process again but using a hairdryer to gently heat the length of the neck. Not so hot as to damage the finish, but getting enough heat into the neck so it is quite warm but not really hot. Then leave to settle over night again.
Words of warning. If you don't feel confident working like this, don't do it. A decent guitar tech should be able to do this for you. If you do go ahead, take care when clamping to avoid putting a twist in the neck.
Finally, raising the saddle might remove the buzz, but it will mess up the action increasingly beyond the 2nd fret and the guitar will intonate increasingly sharp. Solve the problem, not the symptoms.
Let me know if you have further questions.
I have watched real guitar techs do this! I recall my one friend (Well I thought he was my friend but I was probably this annoying teenager with weird hair getting in his way ) who worked on classical guitars a lot had a heated framework that he would clamp around the neck to "straighten" them out. I think I will start with the obvious of seeing if the neck can be pulled into enough relief... if that doesn't work I have some heavier strings... aka the 'right' strings. But I am curious what folks do to make really light strings work... is it just matter of skill? I can believe that.