Many years ago, my luthier told me never leave a guitar in your trunk on a hot day, as it can melt glue, crack wood, etc.. All logical things nobody would ever argue with. But who has actually had that happen? Yesterday I had to drive to NYC for business and I had a 7:00PM band practice, so I threw a partscaster in the trunk in case I was running late (which I was), and didn't have time to go home (which I didn't). I didn't want to chance putting my SA-Studio in a hot trunk all day. But I paid a price at practice with a guitar I was not as happy with or as used to, and I got to wondering if it's really worth it. Logic and fear tell you don't risk a good guitar in a hot trunk, but has anyone really had experience with that, either good or bad?