Dear Carlos
in the file i found this recommendation OpenScad (>= 2014.05.31)
i download the latest OPENSCAD 2019 and i cannot even i copy and past the link.
i don't understand.
i'm really interreseted to build one, i have alredy all electronique (moteur stepper, arduino uno with cnc shield, driver, cable etc...)
i try to see all parts with openscad to try to understand parts and maybe to change some frame.
believe me, i cannot see anything with new openscade, maybe the new one get some upgrade of the language?
best regards