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

FbM7b5, FbMa7b5, Fbj7b5, FbΔ7b5, FbΔb5, Fb maj7b5
Notes: F♭, A♭, C♭♭, E♭
6,3,3,3 (2111)
6,5,8,8 (2134)