An FET is connected between the emitters of first and second transistors. Example optical devices use a photodiode to alter the charge carrier concentration in a waveguide, thereby altering the index of refraction of the waveguide. The fluency transform has a plurality of modes, and one mode is selected from the plurality of modes, thus the expanded-image data is generated in accordance with the selected one mode. A threaded member making at least one-point contact with the outside of the skirt fixes the blade stop in a plane with respect to the skirt. The relative data lane skew values are then used to compensate for the data lane skews.