RT-AC68U - AiMesh or AP?

I've successfully set up two AC68s as AiMesh and it appears to work fine, with much better WiFi speeds upstairs as the mesh node AC68 is in the attic where it can get hot in summer, but according to the digital thermometer that lives in there, is no warmer than 38 degrees celsius.

Now I know I can monitor the router temperature via the web UI but this only works for the main router - I can't view the full web UI for the mesh mode AC68 but can only see network information for the mesh node...

RT-AC68U - AiMesh or AP?