I really like his innovative thinking. Andrew answered my questions about a month ago as I want to give this a go. Since my 930 is set-up in the studio which is not close to my Mac the wire would have to be long, very long. So, I will try this method using my KnitKing FDD. Much easier and no splicing of wires, an electrician I am not. Once I create the file I can then save it to disk allowing me to plug into the knitting machine and download. All I need is the cable to convert to the USB port.
While I muddle through it all you can check out the Q & A recently posted online in the UK:
Andrew Salomone Picture Knitting & Hacking A Brother 930