[Dezmo]

Thats a great page Frank Ford,
Aside from some nicely documented technique regarding cleats and bracing, the part that jumped out at me was:

<<In the heat, the glue under the top brace became weakened and allowed the top to slide over the brace. Later, the glue joint's strength was restored as the instrument cooled.>>

I've reached in with my fat hands and gently probed the bracing. Nothing felt loose or wiggled. I tapped the top and produced no odd rattles. YET as I did all that, I knew the condition of the top meant something had to gave given way.

Its mirror time.