Aluminium Profile Type Router - Initial questions

[AndyUK]

Would you mind expanding on this?

Hah! Yes, "Unless you're going down the linuxCNC route in which case I have no idea" :P

Reading it back it sounds like I'm saying don't use ethernet with LinuxCNC - it was meant as an "if you're using LinuxCNC there may be more appropriate options like onboard PCI cards".