A fuel injector is described that includes a polymeric housing, pole piece, filter assembly, coil assembly, spring member, armature assembly and metering assembly. An optical data input signal to the compensation arrangement includes a data pulse for each bit of data that have been subjected to a data signal change. In an embodiment, the method further includes forming on a lower portion of each probe body that, in use, is directed to the respective terminal to be contacted, an electrically conductive contact region having a first hardness value equal to or greater than 300 HV; each contact region and the respective probe body form the corresponding probe. The completion may include the ability to washdown the well as the completion is being run into place.