That makes sense. I didn't realize GnR tended to tune down a half step. SRV deteuned to Eb because he used heavy gage strings (13 as I recall). Aerosmith detuned sometimes too I think to get a heavier sound.

Just saw your addition to your previous post. Glad you managed to find a backing track in the key you wanted! I'm surprised actually because I thought that would be problematic.

You've got a good plan - hide the recorder and keep the expectations low!!!

Here's hoping your resulting recording provides a pleasant surprise.