Basic standalone Khadas tone board case based of dimensions found here. Not quite sure if things will fit as snugly as desired yet, but will update eventually when the board arrives and I do a few test fits, adjustments and measurements
12/5/2018: board arrived and after some test fitting, updated the dimensions and placements of the holes in the back plate for better a better fit. Also, after looking though the board a bit more, it seemed like a much better plan to use the on board led indicator instead having it where it was originally planned, so I updated the case. Also uploaded a version without any led groove.