Wow! That is a beautiful setup!! Did you make the box? Could we see pics from other angles please? Making me want a walnut one to go with my new Woodscents Squared.Well reasonably happy with result, put one of those "dc buck converters?" in and that seems to stop the voltage wandering so much. Grabbed a shorter braided cable also (ideally would be 10cm longer )
https://flic.kr/p/2kd4mb3