@Woodfly You have three Deco units in Xfinity Deco mesh: one Main Deco, Ethernet wired, and two are Satellites which are connected to Main Deco wirelessly. Starting with Xfinity Satellite Deco, open...

@Almac912 You can connect Satellite Deco nodes to each other with Ethernet cable. For that to work without any possible issues, Satellite Deco in garden office should be far enough from Main Deco to...

@RAL24 Daisy wiring will work. Hardwiring Satellite Deco to each other, without switches, is an optimal solution.

@Jonas1122 Start with this FAQ document: General questions about Ethernet Backhaul feature on your Deco

@Soluna This is an interesting idea and it will work, but as an owner of Synology NAS I would leave it as a last resort. Factory reset will wipe out all user data and files on NAS, which is not very...

@MPP55 In this case Deco X50 and Deco X55 will be the best addition to your X50-5G Deco router. X50/X55 are very similar, choose set that is sold for less (or on sale). If you want Deco units that do...