I am going to order this device, when I downloaded the RAR file onto my PC and used the Win 10 RAR extractor to extract the Gcode files the folder was empty. Is there another source for the Gcode files? Possibly a zip file or something uncompressed like a text file. This device looks like it would be so much easier to use, and as I understand, I can use it on my other 3D printers. Looking forward to your response.