You lost me. What's "banjo work"...Geo
I was raised up hearing the term as referring to fancied up work that added no real substance to something, and made it possibly more prone to break downs. I have never seen an actual definition of the term.
It has nothing to do with the scenes in "Deliverance", the movie. I believe it to be a fairly localized term, Southern in general.
Grandaddy bought Grandma a new 1957 Cadillac. It had a device mounted on the center top of the dashboard (I believe it was called the "autonic eye") that was supposed to dim the headlights automatically when it "saw" the approaching headlights of another car. It had a sensitivity adjustment knob on the back. It was pretty much useless. It would dim the lights when you rounded a curve and the headlights hit a white painted fence. Grandaddy called it banjo work.