Thanks for this topic.
I have a soundboard which I made many years ago, and I intend using it for my next (second) guitar build. Rather stupidly however, I managed back then to lean heavily on it, and heard a nasty crack. Sorry about that - I can feel you cringing in horror. After I got over the initial shock, I examined it, but could find no visible damage at all. There must be some damage though, possibly along the join or beneath one of the braces. I must admit that I'm still sickened by the episode. Fortunately, having used hot hide glue, I will be able to easily remove the braces to inspect everything properly, using the suggestions here, to see if I can spot anything untoward. I might part the two halves if I cannot find anything, and then rejoin them to be certain of a secure fit, and re-glue the braces. The top is a quality piece of European spruce, with lovely bearclaw figuration, so I really want to try and save it.
rikart /warwick harte