Swedgin said:
Other than damaged equipment, why would a player change shafts on his shooting cue during a match? The only time I've ever had the need to change shafts during a match was when I got mad and broke one.
One other related thought on this issue, IME, sometimes switching cues can help:
Back in 1977, I was lucky enough to win a qualifier for the National 8ball Championship. It was held in Dayton,OH, if I recall. At that tournament, every player was given a free Brunswick cue. As I recall, it was a merry widow style cue and had a clear plastic sleeve in the butt underneath which said something like "Nation 8ball Tournament" in gold on black. It was probably worth about $25 at the time. I came home and threw it in my closet.
A few months later I'm playing in the Montana State 8ball tournament. This is a big deal up North because basically every bar up there has two million teams playing 8ball all winter and so there are several hundred players playing in a hotel in downtown Great Falls. My tip had come off my playing cue a few days before and I was concerned the glue job might not take, so, just as a back up, I pull the freebie cue out of the closet.
Right off the bat, my first match, I could tell I wasn't playing well. (Yes, the tip was glued on just fine.) After a few shots, out of pure desperation, I pull out the freebie cue.
Suddenly, everything was right with the world. I couldn't believe the difference. Everything looked right when I got down on the shot. Everything worked right when I pulled the trigger. A little while later, I switch back to my regular cue, a very nice and expensive job, to see how that feels and immediately after a couple of shots I can tell that it's not right. So I go back to the $25 special. To make a long story short, I end up in the finals, go hill-hill, play a safe on the other guy's last ball and lose on what may have been one of the greatest kick shots anyone has ever played on me. If not for that cue, I probably would have gone two and out.
So, IMO, switching can help
Lou Figueroa