In the hope to improve the schematics, I laid out the pcb, using an original rev. B board for reference. This sort of validates the schematics, which should be 100% correct now.
Of course nothing was tested, so errors might still be there.
Use at your own risk.
Please note that the license changes to CC BY-NC-SA 4.0 with this release, which means that any commercial use is now prohibited.