I do a fair bit of house cue work and when they are too beat up or crooked, nothing will save that cue. The pool halls I do work for just gives me the beat up cues and let me deciede when a cue need replacement. I save the cues, sometimes I can use the wood for repairs. A new house cue is about $30, so it`s limited how much time and money you want to spend on them, I do change ferrules as it`s quick and easy on those cues, I just put a whole rod of Juma in my collet chuck, drill a 5/16" hole and part them off. Glue the ferrule on, face it off, put on a Le Pro and trim everything down to size.