@MackPhoenix62 EDITED: Ahhh finally I can select signal source after upgrading to the 1.6 beta firmware! And it works.

@Janu_22 I don't think that will always work. If your Deco unit is turned off, it will try to connect to the main unit again when it is turned on.

Before the beta firmware, I could make my Decos at least not to stupidly connect to the main deco (this is EXTREMELY frustrating!) by following these steps: Switch all the units off Turn the farthest...

I've just installed the beta firmware. It took a bit more time for the whole network to be up, because the farthest unit rebooted twice (probably changing the source signal requires a reboot). It is...

I have the following Deco M5 setup at Home: Main Deco ----> Office ------> Corridor -----> Bedroom (there are 2 other bedrooms each side) I thought the Office router would connect to the Main one,...