@kb867 you could do that yes, however there are a number of factors that could affect the wifi backhaul speeds between the Deco units, IE: interference, distance etc.... this will ultimately...

@MJShepherd cool glad to hear that! Enjoy.

@kb867 Correct as the ethernet ports in the E4 are 100mbps max, M5 and M9 plus have gigabit ports.

@kb867 Deco E4 Ethernet ports are limited to 100mbps so what you are getting (80) seems about right for your setup. You might need to consider upgrading main deco/all Decos to at least Deco M5 or...

@MJShepher So the AX53 is connected to your fibre ONT and is also connected via PPPoE? Then your Deco should be in access point mode. On Deco app go to "more", "advanced" then "operation mode" and...

@JamiryoFC none that I know of, you are on the latest firmware version.