A spool for optical fiber ribbon or other flexible media has an opening communicating with an interior of the spool in which a first end of a helical guide is located. An Nz value expressed by Nz= is in the range of from 0. Thus, if the key generation code or the decryption code is modified by placement of a breakpoint, a trace function, or a halt instruction in the code) the resulting key will be different from the key used to encrypt the sensitive information and the decryption attempt will fail. The steering system has a fail-safe mode in which fluid pressure from the hydraulic motor provides steering of the wheel in the event of a failure to electronically actuate the steering actuator control valve means. An x-1 number of pilot symbol sets are then created and inserted into the data frame such that each of the other reference points has the same phase state as the selected phase reference point. An optimized set of the plurality of processing tools and respective configuration with the plurality of tools associated with the reduced magnitude of the target variable can be determined through processing.