Finally, Mark IV base files are available for download! Assembly manual will be posted with its release, which will happen quite soon.
All major stuff was tested and should fit together nicely at this point, so we can call it a release candidate. For now, you can use MKIII software with it. Later, some cool new features like mode switch, MCU reset button, and easy flashing support will be added. The base is compatible with all MKIII levers.
2 * 18mm long 6x8mm threaded hubs are needed to assemble it.