I’m pretty sure those (or similar) are the instructions I last tried but that was the better part of a year or more ago. I’ve been using 4G/32G Chromebooks and Crouton/Ubuntu almost exclusively for nearly two years and couldn’t be happier… except for Estlcam. Sketchup runs beautifully under Wine on these machines… Inkscape, Onshape, Tinkercad, Slic3r, RepetierHost, Openscad, ArduinoIDE, most gcode senders, etc. all run fine on these modest machines. Estlcam, as good as it is and as much as I’d like to use it, just isn’t enough the attraction or necessity to me to warrant firing up the Windows7 box just for that… and so it sits for months on end. But that’s just me.
I’ll have to give Estlcam/Wine another try and see how far things have come. — David