What a vocal range this man had. In 1986 he contracted pneumonia, which resulted in removal of part of a lung and damage to his vocal cords. He relocated to Sydney in 1988 and was unable to sing or yodel for years as he recovered.
Fortunately, I've never had those problems but I still couldn't sing it in his key, I had to drop the backing track by three semitones to reach the high notes. You know me, I'll try anything (within reason) so thanks for the suggestion Joyce.