I love the Steeldrivers! I'm so sad that amazing gravelly-voiced singer Chris Stapleton (as featured in your link) has left, and before I got a chance to see them live too...as I'm in the UK. I guess you heard a performance with the new singer then? (I see that Mountain Stage is a radio programme). I've heard the new guy is pretty good but Chris Stapleton was really something else. Luckily (for me) he is on all tracks of the recently released 2nd album.