A fuel injector is described that includes a polymeric housing, pole piece, filter assembly, coil assembly, spring member, armature assembly and metering assembly. The imaging elements on the respective imaging planes in the high-magnification optical system are adapted to image semiconductor chips, while the imaging element on the imaging plane in the low-magnification optical system is adapted to image a lead frame. The filter may be coupled between power side wires and outlet side wires. The guiding step ensures that the spring contacts the socket during assembly and, therefore, ensures that a conductive path from the socket to the spring is provided. The channel re-allocation module re-allocates the streams being transmitted over the defective communication channel so that they are transmitted over the other unaffected and non-defective communication channels. The management system can derive recommended neighbor lists for each sector in a wireless network based on the cumulative event data received from the set of devices operating in the network.