Hi

Any help or advice would be greatly appreciated.

On top of the app upgrade debacle which has wreaked havoc on my SONOS system, I have now upgraded my internet package to full fibre (UK), so I am switching from a regular router from British Telecom to an ONT and router from another UK ISP.

Due to Wi-Fi issues in my house, I have decided to move to a mesh system and have purchased the TP-link Deco X75 Pro 3 pack (it is overkill, but it was a great deal and hopefully future-proofs things for my network).  I have not installed the Deco routers yet.

My current SONOS set up is a Beam (gen 2) hard wired to a 5 port switch which is then wired to the router.  The Beam is connected to an LG C2 Oled TV, which also has an Apple TV 4K connected but using Wi-Fi.

I have an Era 100 in the next room along with a BT Complete Wi-Fi disc.

In the room next to that I have a SONOS One.

Upstairs, I have a SONOS One and an Era 100.

My local music is currently stored and accessed on a Synology NAS (but not since the app update), but I have decided to upload my complete music library to YouTube Music as I have a premium account for YouTube.  I will stream my own music going forward and retire my NAS.

I intend to connect the Deco straight into the ONT and name the new network the same as the old one that is being replaced.  As I have the 3 pack, I will probably use the other 2 as satellites and place one in the next room to the ONT/router and one upstairs.

I access SONOS through the Android app but still have the Windows Controller software on my PC.

I am unsure as to the best way to set up the SONOS system on the new network, and if I should still hardwire the Beam into the TV?

Should I consider factory resetting everything and starting with a clean system?

I have come across a lot of conflicting information online about using a Mesh system with SONOS, so wanted to see if anybody has any advice on pitfalls or best practice.

Apologies if I have repeated an issue that has previously been posted.