The optical design for the MAS 2.0 catadioptric relay included an evaluation of the mechanical mounting tolerances as well as the temperature stability tolerances. Since the overall goal of the project was to construct a practical, low maintenance device for everyday laboratory use, the opto-mechanical design, the system components that allow the precise and durable positioning of all of the optical components in space, should be designed to enable a practical initial assembly and optical alignment resulting in long-term stability relatively insensitive to normal laboratory conditions. This was the case for the original MAS 1.0 design, which in our lab has operated reliablywithout realignment or repair (excluding the fluidics and light source)-for about 15 years. Nevertheless, the intent of the MAS 2.0 design was to include an additional margin of reliability as well as compensate for the more ) is not shown, nor is the rectangular field aperture, at the exit of the homogenizer, that is used to shape the beam to the aspect ratio of the DMD.