I am currently running an Airport Extreme as my primary router with an Airport Express connected wirelessly to extend the network. This works well, but still leaves a deadspot at the end of my house (Extreme at front, Express about halfway. I can't move the Express any further or it loses connection with the Extreme. I'd like to add another Express, but I don't think I can daisy-chain them wirelessly. Is it possible to connect another one to a Powerline adaptor and use it that way?