In one embodiment, a method includes routing first test data from a first channel of a device to a second channel of the device, and outputting the first test data from the second channel. The toner for electrostatic image development of the present invention can be suitably used in developing latent images formed in, for example, electrophotography, an electrostatic recording method, an electrostatic printing method, or the like. Automatic computer monitoring by one or a plurality of programmed redundant digital motor management computer or autopilot controls each motor-controller and motor to produce pitch, bank and elevation, while simultaneously restricting the flight regime that the pilot can command. In addition, the pump off control function is accomplished by a microprocessor which is mounted adjacent to the downhole sensor array. In contrast to the SLR approach, direct control on the phase of the magnetization profile is retained throughout the design process. In addition, a method for forming a maintenance access on an elongated and in particular tubular hollow body is claimed.