When learning Mark’s songs, for me, this process has two types of outcomes: either it’s really hard to play, but probably played that way (like in the recently covered “Don’t You Get It” or “Sucker Row”), or it’s too hard or impossible to play, so it probably should be played differently. That happened to me in “Angel Of Mercy”, where I figured it must be Open G because it’s too hard to play in standard tuning. And once I got a thought like this, the song played itself. And what a happy song! And what a solo! Pavel.