One embodiment of a transition-to-turbine seal comprises an upstream portion adapted to engage a flange of a transition. When the surface deviates from its desired position, the reflected beam of light does not fully register on the light detector, causing the light detector to generate less than peak output signal. The shell includes a floor panel and at least one upper panel joined thereto, the floor panel being adapted to be fixed to the ground. A second plate is rotatably connected to the first plate. Further, the keys within each group may be ordered based on chronological order of use, frequency of use, or by a correlation to a graphical toolbar.