Thanks @Alexandre. Unfortunately I have smart home devices that don't support 5GHz, so I can't do that. I appreciate your idea though.

My router is connected to my main M4R(2.0), which connects via ethernet to other M4R(2.0)s. In the furthest reaches of the house, I have M3Ws. When I work in my study in the loft, I often get slow...

Adding another disgruntled customer's voice to this thread. Trying to run a smart home is difficult enough without manufacturers asking you to run two *incompatible* apps. The failure to think about...