I have FIOS home internet - G3100 roter and E3200 extender.  I just bought the Deco X20 and set it up in access point mode, with two one device connected to the router in the basement and one device on each of the other two floors.  As far as I can tell everything is working, but does anyone know if there are any tweaks I should make to the FIOS router and/or the X20s to improve coverage?

Thanks!