My guitar guy uses water-thin cyanoacrylate adhesive "Hot Stuff". The capillary action distributes it through the wood. He says in a lot of cases the repair is actually stronger.
NEVER use CA glue to repair a stress crack. It's brittle and does not withstand the pressure. Same goes with epoxy and that crappy Gorilla glue. Titebond original. CA is good for repairing chips, maybe glueing Nuts on....but never anything structural.
My $.02.....I've worked as a Model maker in quite a few rapid Prototype shops, doing work for Nasa Motorola as well as our Military.