@terziyski That's exactly what I did in the end, both extenders connected to the hub 2.4Ghz & 5Ghz bands without any problems. This should be highlighted as the default option, why Tapo chose to make...

I've had a couple of TP range extenders fo some years (RE450 & RE650) which I seem to remember were easy to set up & they have always worked well since. Due to a fault I've had to replace my BT smart...