You say that but I really like him and his videos so I watch him and listen to him a lot and yet have to see him use the other detuners that are not for the lowest string.
He has a few videos in which he experiments with non-standard tunings but in those videos he doesn’t change on the fly if I remember correctly. It’s just edited. On that note I really loved the comment:
TwoSet Violin: “Bass sucks!”
Davie504: “Violin sucks!”
Charles: “My bass is now a violin!” (fretless tuned like a violin G - D - A - E)
I agree. He is really good and in my opinion he manages to do technically challenging things but not on the cost of sound/groove. Not easy to do on bass I think. Not so sure about “gifted” as I saw some videos about what and how long he practiced but yeah… he is really good 