Nice thickness sander .. My only thought is : you do know they've invented better glues ? When the center seam separates, its usually put together with Hyde glue or fish glue ... Original Titebond glue is used by Martin and other top grade Luthiers for a reason.... If Stradivarius had access to Titebond, he would have used that instead.. Fish glue releases easy in dry weather .... Not all of the old school Luthier things are good today..