D3D Universal v21.06 Software
Marlin is the same as D3D Universal 2. Just update the LCD screen text to D3D Universal 3.
Download the D3D Univeral 2 Marlin - https://wiki.opensourceecology.org/wiki/File:Marlin_Universal.zip. For more info and change log see D3D Universal 2 and navigate to D3D Universal v20.07 Software
Firmware - notice that the print moves up, then shuts off motors. Don't shuf off motors, the axis falls down.
