I have an ol Martin D12-20 with light gauge strings and kept it tuned down a step for over a decade. Then I figured, hey, the strings are light gauge, tune it up and quick fooling with the troublesome capos. The next day I opened the case and found the top pulled up at the bridge. [What have I done?!!] I quick tuned it down and wondered where I would have to take it. [yeah, Bruce can fix it] But it came down on its own. I've never had to do anything to this guitar so far and it's been faithfully tuned a step down from that painful incident. So EJ, lets do some pickin. In the 80's the 12 banger was sort of my trademark instrument. Drop D tuning is fun.