When Stewie first introduced my partner and I to the recordings of BF Shelton and Alfred G Karnes (weren't they both singing barbers??) a few years back, we were just blown away by their singing and playing!!!
I also remember at the time finding a swag of data on the Net about the Darlin Cora tunings - maybe it was on some special old timey banjo site? - and also, on the history of this song in the Folk Revival (maybe its lineage was from BF Shelton to Pete Seeger to the Kingston Trio ???)
ANYWAY, whatever, it's all FANTASTIC stuff from both these guys!!! (An' we're quite partial to old Ernest Phipps too!!)