I've been using Titebond Liquid Hide Glue, on mine and customers instruments, for years and have never had a problem. I recently had to remove the back of a guitar, that I had repaired about 4 years before, and I assure you, the glue was not failing or weakening. The only "trick" I use is to load the parts up heavily with the glue and get lots of squeeze out, and clamp it for at least 3 or 4 hours. It requires more cleanup, but insures total coverage, particularly gluing to kerfed linings. It cleans up easily with a warm, damp cloth.
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