ac to ax

I have a AI Mesh with 4 routers - main is an AC86u, with 2 x AC66uB1 as nodes on wired backhaul and one AX56u as a wireless mesh node - this mesh serves 25 devices, some of them streaming, some computers and tablets, no gaming interest. All routers are using 3.0.0.4.386_4 Merlin firmware. The...