I have a question to see if this is possible, I will be setting up a network with 3 AirPort Extremes soon running ethernet cable to connect each one. I'm aware that the main router needs to be in the default DHCP mode, and the 2 others need to be in extended mode. What I don't know is if it's possible to use the 2nd (middle) router to extend the 1st router to the 3rd. Apple's image shows that you need to run the cables from the main router, which will require alot more cabling: What I would like to know is if my image below is possible, thereby eliminating the need to have another cable go back to the 1st router: A. is the main router, B. and C. being set in extended mode. I appreciate your help!