Many players in my pool league have Predator break cues which all look alike. Had mine taken by accident too many times so I decided to make mine more identifiable.  I removed the rubber base plug with the idea of replacing it with something more visible. The original plug was only about 3/8" thick and not visible when the cue was standing up.  My first replacement was orange PLA and it held up for about a year when the treaded portion brook off inside the cue.  My newest design prints out of Bambu Labs red TPU-AMS.  It's longer so I can see it better and added fuzzy skin the the outside except for the treaded portion.