The one that is basically unplayable in current condition is the Flamenco...

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Although it looks worse, the Fender acoustic is still playable and sounds fine...

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...I am just not sure for how much longer.

Don't much want to do anything to the Coronado. At most the superglue and bone dust trick. I really don't want to take the nut out, however. You can see why...

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Thanks for any and all advice!