Just my humble observation, but I'm thinking that what, where and where from we take the photos/videos dictates (to a great extent) what expression we end up with. I see it as a bit problematic to capture images that provide a good platform for stunning visual results. After experimenting with Gunnars hands and our möck-up harp, I've come to realize that the camera probably has to be integrated into the overall design.
My suggestion is that if a camera is top mounted and shoots downwards with a wide angle and aims to capture the hands and perhaps a bit of the body of the user, we'll have a good starting point. Also I suggest that if we mount the strings radially outwards from the image centre (or a corner) we'll have a starting point that allows for easier making of different patterns.