@David-TP Yes, that was the basic topology one other M9 plus in the house. All in the house were going direct to the new main X55 (no daisy chain) and had strong signal. After going back to my using...

Well things are still not going well with this setup. My Dell laptop will initially connect to my new X55 at Wifi6 that is sitting just 10 feet away. Speedtest gives me >500Mbps. But later after...

Today I started with a mesh network of four Deco M9 Plus in my house. On one of the satellite Deco's I have connected a TP-Link 5GHz N300 Long Range Outdoor CPE that is outside the window pointed at...