The present invention utilizes a single DMA engine to process the requests of active DMA channels competing for transfer of data over a single bus. A server polls a client device for its configuration file. This objective is accomplished by an abhesive layer or abhesive coating of cross-linked inorganic nanosols with additions of polyorganosiloxanes, which form a three-dimensional network in the layer. A power level of a spectral channel may be attenuated by rotating the channel micromirror with respect to an effective attenuation axis that is non-orthogonal to the dither axis through a combination of rotations about the switching axis and the attenuation axis. The drop channels intersect the distribution channel and exit the body at a different one of the nozzle channels. The sliding piece closely fits the housing when the lock is released.