Thanks folks! I woke in the middle of last night with a blinding revelation, not quite Saul on a donkey but pretty good for me. I used to make backpacking mandolins and I still have some gorgeous Alpine Spruce I used for bellies. I'll use these, turn them circular, carve a nice rose and glue them into a recess (in effect to make a cover for the bowl), and set up a boxwood or sycamore bridge. I can use the brass screws as anchors and nuts and tune them with wrest pins. I read Tobias's statement and I respect and value all the work he did to develop the bowls. My solution is completely different from his work so I feel morally vindicated! I'll post a picture or two and maybe a video when I've done one. Thanks again!