I've ordered two shafts with every pretty much every cue I've had since the mid '70s. Have always played with both, keeping both tips in playable condition. I use one on odd days and the other on even days. I've never kept on shaft un-played, don't see any reason to do so. There is a myth about keeping one shaft unused as a selling point but personally I've never seen someone buy a cue for this reason. I've never had a problem selling a cue with two or more used shafts. My Dishaw currently has four, I use the two newer ones most of the time but also play the two original enough to be able to play with any of the four whenever necessary.