I finally got around to creating some detailed schematics for my control board, as of the 26.07.2016 it's up to date for the version based on the external power supply. Hopefully I will be able to use Eagle to create a PCB in the future, but for now it only serves as reference. You can get My Control Board PDF, or even The Schematic to download.

My orginal plan was actually to use the schematic for bug fixing, but I managed to solve the problem right before I completed it, so now it's just a "nice to have". If I end up making a PCB I will also release the .brd file.