iPhone Charging Dock (interlocking)

I was tasked with creating a multiple phone dock for our school so teachers could charge a classroom set of iPhone 5C's overnight. There were options available for purchase, but many were not real affordable and didn't seem simple to use. This design is a single dock that can be connected to other docks to create a "bay" for charging. The interlocking docks create a channel underneath for cable management. FYI: The charging cable does need to be glued in (silicone or CA) for this to really w