I am still testing, but my tests today are so far more promising for the zyxel.
Thanks, that's very encouraging as I am thinking of following same plan.
But can you by any chance confirm my assumption... that a 2nd LAN cable is required to link router to Zyxel/Modem for stats gathering?
As further background, I simply want to try and keep the modem near the master socket for 'best chance' connection, yet keep my existing router and AP in its existing location near the centre of the house, for optimum WiFi coverage. Also because I have wired the house with Cat 5 cabling which radiates out from the shelf on which the router sits, making it a natural place for the router as well as a separate Gigabit switch. And I am near capacity on these Cat 5s as well as switch/router ports. If I need another connection, I may also need another Ethernet switch, which seems a shame.