An existing network configuration is assessed, and potential changes to the existing configuration are identified that provide the greatest incremental improvements to the performance of the network. A service request is received at one service provider of a plurality of service providers, each service provider adapted to receive service requests from service requesters and being in communication with middleware software and with one another. The outer yoke includes an outer thicker portion axially opposed to the first and second outer permanent magnets and having a larger radial thickness than a remaining portion.