Lou Reimuller made a special recording in 1992 of the song "Blue Heaven Blues", originally done by Charlie McCoy, Bo Chatman and Walter Vincent in 1930. On this cut, Lou plays the National guitar and the National mandolin by laying one track over another. He is also singing. This is a Hokum Scorcher's song from their "Feed the Kitty" album.
This song changes every Sunday or Monday on my website, so it will be different by the time you read this post.