Now building my own Raspberry Pi based controller

To answer my Cat5 question… the guy over at the Protoneer forum says yes use it. ok I will… I have tons of it.

next bit of info:
it sounds like the Arduino is connected via serial, not via USB which is what the driver looks for so you need to Easel to look for the different port of the RPI.

/dev/ttyama0 is the CNC Hats default port.

Here is the link showing how to get Easel to look for the new com port.

… guess I am about ready to start putting this thing together and do some tests.