I live in a 4 story townhouse that is pretty awful with wifi across floors. I have Comcast Blast Internet. My setup on my main floor (floor 2) is the newest Airport Extreme. The signal significantly degrades on the 3rd floor. I started by first purchasing the newest version of the Airport Express and using it as an extender on the 3rd floor. That really didn't help much. My current setup is the Airport Extreme on floor 2, Ethernet to Power Adapter on floor 3 with that connected into an Airport Express as a duplicate network with same name and password. This seems to be working okay but not great. The top floor (4th floor) is still barely getting a signal. My thought was that I would just purchase another Ethernet to Power adapter and another Apple Express and duplicate what I did on my second floor. *My question is about setting up separate duplicate networks like I have. Floor 2 has the Airport Extreme so this should be transmitting the 802.11ac. However since I'm technically not extending the network but duplicating it I would imagine that the Airport Express units are only transmitting 802.11n correct? If that's the case should I just buy multiple Airport Extreme's and connect them to the Ethernet to Power adapters on each floor? Thanks!