@Guyldr If you have a main Deco and a satellite Deco in the same mesh, you can certainly use an Ethernet cable to directly connect the main Deco and the satellite Deco.

@Wokoman How are the M5 connecting to the X50? Does the app show the M5 as satellites of the X50?

@Oulu When the third Deco is close to another Deco, but not plugged into it, does it work as a satellite?

@blaznim_vole It is not always optimal to have a better signal on the lowest Deco. In a chain connection, all traffic from the lowest Deco will have to travel an additional time via the wifi network.

@friedeggs Your Deco will require to be in Router mode, and you might have to change some settings in "Internet Connection". There is no reason, however to removing the network, creating new network,...

@Nev_P Do you mean the satellite connects via Ethernet to the main Deco in AP mode, but via wifi in Router mode? Could you describe the way your Deco devices and you ISP box are connected together?