Ok, er, they're suggesting adding an earth rod with their RF Router to dump additional ground noise from the system. To me that would be worse cos the system would have two different ground references.
Hah, just had a look at that. I love the idea that it comes with a carry case. I appreciate cables are portable, but once it's in your hifi, does it need to be? Handmade? For that price I'd want some machine precision engineering, not some dude with a soldering iron putting my cable together.
Well, I think I got to the bottom of it. The cable coming from the TV into the floorbox is missing a pin at the floorbox end. It's marked up as Channel 0+ (pin 7) on this diagram:
That I'm not sure about. It could be a result of some rough handling, or maybe a manufacturing defect. Either way, it's needing replacing. Pic attached of the offending lead with a working one for comparison.
Edit - a prize for the person who guesses what body part they're squeezed between. :|