Any problems configuring Airport Express as bridge to Verizon FIOS Actiontec router?

I installed five Apple refurbished Airport Express devices to create a WIFI network in an average size church. The units are configured as bridges within the "Create a new network" category. Static IP addresses. The devices bridge to a Verion FIOS Actiontec router. The FIOS router's WIFI capability has been disabled. All indicators suggest that everything works. I perfromed a walk through using my iPad. Connectivity was continuous and download/upload speeds were at the top of the range. All the devices run to the FIOS router through a five port fast ethernet switch. Three of the devices use dedicated Cat 5/6 cables. Two of the devices share a cable. That is they are connected serially via the two ethernet ports available. Airport Utility shows all green lights. So, any suggestions as to what type of problems could come up and bite me?