I have one of these running in my house, recently bought it used with firmware 2.3.079 20190311. I know that there is at least one called 2.3.086, and maybe there is something even later. But is there any gains to get from upgrading this, or should I just leave it alone? It is stably connected to the mesh, and the LQI is 208, which should be good, as far as I know.