Just replaced my older Extreme (A1354) as I was having issues with my home network. Went out and bought the newer tower Extreme (A1521). Thing is, the older extreme *might* still be good. As I was resetting and moving wires around, I moved forward with the newer Extreme. If my older extreme is still in good working condition, can I use it to extend my home wifi? My home office is in our basement. I can get good strong signal wifi on the 1st floor. On the 2nd floor, it starts to slow down. I ran an ethernet cable from basement to 2nd floor and connected an Express to help with the slower wifi. If I disconnect the Express and connect the extreme to the ethernet cable, will I see a difference in speeds/signal on the 2nd floor?