...(as I've read) didn't carry his own cue to tourneys, rather he'd borrow one from someone. Arnold Palmer used to have dozens, maybe more putters, and he'd rarely use the same one from day to day. Whatever felt good that day, you might say. Maybe you can get too complacent using your usual cue, whereas a different cue would bring in a different mindset, something that would reduce, rather than increase tournament jitters.