Thanks Crazy, I had thought about that one also but you beat me to it. But with your natural flair for words explained it better that I would have. Don't forget you can also use that trick for scribing shapes into plastic. If you just heat the tool less and do not push through it will leave a nice imprint in the size you have chosen. Great for making hatches.
"Eat your pudding Mr Land". "I ain't sure it's puddin" James Mason-Kirk