This is a work in progress…
I added a finger piano playing arpeggio based on descending triads. 6:5:4 and 11:9:7 in the key of C.
The percussion is more of that sitka spruce board with the contact microphone and an assortment of combs, rocks, screws, and other devices glued to the surface. One makes a kind of “cookie” sound from a metal comb with different length prongs.