I am seeking a way to secure the key to my CB-6000 as I do not have a 24/7 key holder. I have thought of ice but that can be quickly melted with the use of water so no good. I have looked into CD tray release software which work but are not secure as the CD tray can be opened by other methods which equals no security. Mailing the key to myself is a good idea but no real safety backup in place. So, any other ideas?