Kevin Barry is the master. I went to his house and recorded overdubs on my upcoming record. He played lap steel mostly, but at one point I said, "you know, I'm imagining sort of a baritone guitar sound here," and he jumped up and said, "let me go get mine! I never get to use that thing!" So beautiful. He plays lap steel like a theramin, moving his fingers and hands around in mysterious shapes that result in mind-bogglingly gorgeous sounds. His intonation is so so so SO excellent.