The Hub

when setting up acoustic guitars, from time to time I have a lot of trouble with getting the G string to ring true when fretted. Starting from lower frets and at its worst at about the 5/6th fret, the G string buzzes when plucked "heavily" (when no other string does so)...most recently a Taylor 724 which had a neck adjustment to reduce action (to 5/64-4/64), relief about 0.003 or 0.004. Increasing relief to about 8-9 helps somewhat. I located some high frets up the neck, corrected and hoped that it was fixed...nup. Took a closer look at the neck and decided there was a tiny ski-jump started at 13th fret - dressed some fall away into the upper frets - still no go (better, but still there). It seems related to relief, so I moved the relief around from straight to about 0.11 and found the best setting for relief about 0.008.

I experience a similar thing with my own Martin OM-42 - I just about got rid of it with a new saddle with correct radius (16") but the Taylor saddle was correctly radiuses and I didn't want to mess with it....

Are there any other things I should consider?