Bach's birthday is later this week (21 March), so I thought I'd do one of his tunes. LSB says that "Potsdam" is adapted from something he wrote (although it doesn't say specifically what), so I decided to do that. However, it's in different keys in LW (D major) and LSB (Eb major). I transposed the LSB arrangement down a half-step. I had to change the last note though because I can't play a low F# on mandolin (it goes down only to G). I made that into an A so there's still something of a resolution.