Hi,
Yeah ... I can't stop looking, either!
What is weird to me, is seeing, mostly, just conventional instruments ... instead of further and stranger ones ... gads ... I wanna learn to play the double-stick! ... but Bapu won't let me! I'm thinking ... bass on bass on bass on bass with different sounds ... but that's too weird for here?
Btw, Egberto Gismonti has his own built 8 and 10 string guitars ... and his early accoustic albums with those, are insane, amazing and quite good. Although some folks don't seem to like freeform music that is not locked down to a clock! This was, then, ECM at its best freeform ... a veritable Keith Jarrett on guitar!