[pops]

I agree with John about removing the board and re-gluing, I have done this many times over the years. I believe compression fretting goes back to when Martin was using bar frets. They came in different width's. I replaced the bar frets in my 1928 Martin with bar frets that were a few thousands thicker, the neck, which had too much relief, came out very nice and I did not have to do a neck reset. The action and relief problems were cured with compression fretting. A fret with a slightly larger tang can do wonders for an old guitar with a non adjustable neck without removing wood or taking off the fingerboard. Extreme cases require the board removal, but compression fretting is a valid and acceptable practice in my opinion and Martin used it in their early guitars with bar frets. Martin talked about compression fretting for those guitars as a way to control the neck relief and had bar frets in at least 5-6 different widths just for that purpose.