@Elfstones 

The Deco has three methods of 5G backup:

1. running the 5G Deco as the main Deco, called "4G/5G Backup Mode".
2. running the 5G Deco as a satellite Deco, called "Hybrid Mesh Backup Mode".  This mode is not available yet on X60. 
3. running the 5G Deco as an independent mesh, not integrated with the other Deco, called "Hotspot Backup Mode".  This mode is not available yet on X60. 

More info: https://community.tp-link.com/en/home/forum/topic/703810

  @yves_b 

thanks so much for a quick response. Question would wired backhaul help and the x60 nodes get better speed. I would think then only devices connected to the x50 would slow down a bit? 
 

Thanks again.

reading the article you sent too 

  @Elfstones You do not provide information about your setup, hence it is difficult to suggest anything.

  @yves_b 

So at the moment I the whole system using wireless backhaul, three x60s and the one x50 5g.

Till I get the actual sim card for the backup connection, I've made the x60 the main node to keep the speed up.

It was just a thought if the all the nodes connected via wired backhaul would the wireless speed increase or not if the x50 was the main node.

Thanks.

Jason.

  @Elfstones I expect a wired backhaul will significantly increase the speed for all devices connected to the satellite Decos.