Jed, Sonny Osborne recorded many songs with a six string banjo (as you describe)

Some of the songs were:

Up this Hill and Down. You Aint the Kinda Woman I Wanted (but yer the kinda woman I got!)

The Osbornes were already getting a lot of flack because of their use of electric bass. (this was in the early seventies) When Sonny started playing his six string, many traditionalists stopped being fans. A few years later, when he had his first "Gitjo" made, they practically passed out!

Cheers

Rick