Okay so this is an odd one. We've had an RBK50 and RBS50 mesh in our house for a few years now. It's been great despite the construction of our house (1930s British engineering brick based ) being almost impenetrable to radio signals. I think this is based on a kind of chicken wire construction within the walls. We have the RBK downstairs in the house and the satellite in an upstairs bedroom which link well through the ceiling construction.

As I have just built a workshop at the end of our garden I was wanting to have wifi/ethernet down there and although the RBK is a solid performer, the walls suck so much of the signal each way that come the end of the 75ft garden there is no wifi.

So, I recently purchased a used RBK40 with 2 x RMW30 plug in satellites for £50. I've since plugged one RBW30 in to another bedroom where the signal was poor and it's improved things no end, leaving me 1 x RBW30 and the RBK40. The reason for buying this is the electricity for the workshop is already run down the garden (the workshop is not yet wired up) and I was envisaging plugging in a powerline adapter system (I freed two of them up by installing the first RBW30) one by the router and the other in the workshop and then plugging in the RBK40 in the workshop adapter to create an extension of the house wifi mesh (passwords and network name the same obviously).

I know there will be a performance hit over the cabling and maybe too much of a loss of our 350mbps cable service though if I get 100mbps down there then i'll be happy.

The question then is, is this a workable idea (not ideal I know) and if so, is it just a matter of putting the RBK40 in to it's NODE mode and plugging it all together? I will likely put the last RBW30 in an adjacent building to communicate with the RBK40 but i'm not sure how this node mode really works. There is no salvageable signal left from the RBK50's wifi at the end of the garden and running an Cat5/6/7 cable is too hard now due to structural obstacles in the way.

Thanks in advance for any opinions, views or solutions.

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Odd mesh setup confusion on my part