Hello: I don't know if we can use two "Apple Extremes" in a network design? The reason is because there is two apartments that I want to link up to the same network, but the WIFI connection can't go thru that much concreate so, I was going to link it up with Single-mode fiber... and then use media converters to switch it to ethernet and plug it into a hub... but the problem is... I dont know if on the other side we should use Apple Extreme or Apple Express so we can plug that into the hub and then extend the WIFI network coverage in another apartment... I don't know if you can then extend a "Apple Express" with another "Apple Express"? Please look at the diagram that I've setup... Thanks again guys!