I have a Predator cue. I also have a Predator break shaft. Just the shaft. Both shafts work on the same butt. They are quick release, so I can change the shafts just about a quickly as someone can change from a break to a playing cue. Is this legal? I know that unscrewing in the same as conceding, but I also know you are allowed to change shafts if something is wrong with your shaft, or if you don't like the feel or tip of the shaft you are using.