@daveyf , if i were remodeling, i would look at fiber optic in the walls instead of Ethernet cable; thinner, more flexible, easier to work with, etc. And most importantly, no potential for EMI (or electrical surges); Just need a nice little FMC and transceiver SFP (e.g., a Finisar one that is compatible with your fiber optic cable) and a short Cat6 (or Cat8 is you want shielded) cable to connect to the Aurender.
If your existing router doesn’t have a slot for a SFP, you would need either get a new router that does —there are quite a few — or add an FMC at that end too, but the EMI isolation seems worth it to me.

