4-String Banjo Chord Chart and Tabs in Whole Step Down Tuning

Sib7b5, SibM7b5, SibM7b5, SibM7b5, Sib dom7dim5
Notes: Si♭, Re, Fa♭, La♭
0,3,4,7 (.123)
0,9,8,9 (.213)
0,11,8,7 (.321)