The old Airport started having connectivity issues, and would eventually stop detecting the wireless router (the range was somewhere between 5mins to 45mins max, and then would drop) - leaving me totally deprived of internet access!
The process was pretty straight forward. Following the pictures was great. Conversely, I can see how someone might mix the screws...so just remember to keep them segregated. What I did was basically put them on top of a sheet of paper , and drew a circle around them, and pointed them to a step # (which of course I also wrote on the sheet). That prevented me from getting lost.
don't be afraid to use the force (physical) on those prongs and connections! oh, and keep your screws separated.