Should probably have updated this thread.
I broke my thumb pretty bad so all DIY was put on hold.
Just before the big fat man in the red coat came I got the living room finished with my modem and master socket as I wanted it.
My modem patch lead comes from the modems RJ11 xDSL port, in the bottom of the master socket, and terminated directly to the IDC's on the back of the NTE5A.
The 2nd pic shows I had to strip back the outer sleeve of the CW1308 cable to expose the pairs in order to get the cable to fit in the bottom of the NTE5A faceplate.
It's neater than the photo shows, I gave it a tug before taking the photo to show the exposed pairs.
The MK3 faceplate has a gap on the underside for feeding a cable in like I have but it's just a small notch on the NTE5A.
I can find 1 source on the whole of the internet with NTE5B faceplates in stock.
NTE5B from COMTEC.
It's £6.50 delivery though making it over £10 for a blank faceplate.
The NTE5A will do for now.
Average sync/attainable improved by about 0.3-0.5Mb.
The patch cable is only about 10cm shorter but I also had to replace my AAISP unfiltered faceplate with the NTE5A.
The unfiltered faceplate has no IDC's on the back to connect to.
Yes the Zyxel lights really are (well almost) that bright. The picture makes them a little brighter but not much.
There's an option in the WebUI to disable some of the LED's but if you turn the Ethernet port lights off it turns the actual ports off.
The other lights seem to turn themselves back on after a while.
Some black electrical tape will temporarily be placed over the disco show till a more appropriate solution can be found.