Chopdoc...I've owned expensive cues ($1000-$5000+) for the past 3+ decades. I've lived in the mountains, and so left my cues in extreme cold (minus 20 degrees), as well as being in very hot places, like AZ or Vegas, in the summer (120-150+ degrees). I have left cues in the car for months with no damage EVER. Now they still get taken out and played with almost on a daily basis. Not saying it can't happen...but it never happened to me...even once. Like JB said...well made cues hold up under just about any conditions.
Scott Lee
http://poolknowledge.com
Scott Lee
http://poolknowledge.com
But the fact that nobody seems to want to try something like this with a high end custom speaks volumes.