Anyone have a bit of bottle neck in there armoury? makes a change from the skinny strings glissing...
Did a google and came across a few... quite like this on a 3 string.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://m.youtube.com/watch%3Fv%3DYf9nXHmAgKM&ved=2ahUKEwj48L_1y63vAhVXUBUIHQ8rBM4Q28sGMAN6BAgBEEQ&usg=AOvVaw1jDApcLWevOFpgma4ymaFT
Something different...