Forgot to link to the paper circuit page/schematic - http://ciat-lonbarde.net/paper/man/index.html
the box is my own design tho, it’s just a cheap craft box from The Works, the spikes are leather jacket studs (the large screw-in type) with the wire from each touch contact wound round the screw on the inside of the box
really nice to have an instrument playable purely by touching. That one spike in the corner outside of the pentagram controls the volume, if you aren’t touching that plus some other spikes it’s more or less quiet (bit of bleed thru tho).
the central spike I added because it seemed like the centre point of all 5 parts of the circuit should be touchable too 
I might change one of the ‘hairy capacitors’ as the biggest one i chose makes an oscillation so low that it just sounds like a click every 6 seconds or so rather than any kind of continuous waveform 