I played on on one years ago, but then I switched to a 5-string. Now I’ve switched back to a low-string extension with Anzellotti capos on C#, D, D#, and E. Has anyone published suggested scale fingerings and simple exercises for learning to use one of these things? I’ll figure out how to use the capos, but I know there will be times when I’ll have to finger the low notes manually. Thanks in advance for any suggestions!