@Sunshine Thank you for the quick response! 

I have the following problems:

• When using Smart Connect I am unable to specify the channel I'd like to use. My best 2.4 GHz channel for the router & repeaters combined is 11, but because my router lives in the middle of my house it does not realise that the furthest repeater requires channel 11. Therefore it often changes to another channel that it thinks is good, but which is in fact bad (from the furthest repeater's point of view). It mostly changes back to 11, but until it does that I can't always control my remote Tasmota devices via NodeRED.
• I cannot scroll down when selecting devices for QoS. I can see four and a half devices on a FHD monitor, but would hate to buy a 4K monitor just to simplify adding decives to the QoS lists.
• The not-so-very-hidden hidden SSID channel.  Not really a biggie, but it would be nice to be able to hide it like other firmware versions can. It gets quite busy when using a WiFi analyser tool!
• There is an option to name clients on the MR600. Despite being in a Onemesh setup, these names do not get reflect on the repeaters, and the repeaters themselves do not offer the option of naming clients. This is most likely an enhancement request for the repeater firmware?

Thanks in advance,

Christo

  @Sunshine Thanks again for the answers.

1. It's a pity that manual channel specification and smart connect are mutually exclusive

2. I'm using the Archer's QoS. Here's an illustration of the problem - there are more devices below the red arrow but no means of scrolling down to access them once I've clicked on the "scan" button:.

3. Yes, I am indeed using OneMesh. Is the hidden network some form of WiFi backhaul / management network for OneMesh?

4. The RE300 devices don't seem to communicate properly with the Archer MR600. The Archer has the option to manually add names for devices that don't have their own hostnames, and I thought/hoped that those names would be communicated through to the RE300s.  Here's the Archer's view of the kitchen's repeater (3 clients);

... but the RE300 repeater itself says there are 6 devices connected, and only one of them has a "Device Name" (laptop's hostname). It is not possible to edit the device names for the devices at all on the repeater.

I presume the OneMesh updates between the repeaters and the Archer aren't done in real time, and also don't include device names given to them on the Archer?  The unknown devices on the RE300 repeater are things like Tasmota WiFi switches (that do actually have hostnames) and security cameras.

Thanks in advance for your response...

Christo