An opt-out actuator for which actuation is cancelled if the operator changes his or her state within a prescribed amount of time. The split-ring gland includes two partially circular gland members with spaced ends defining a gap. Often, a nominal patient center of gravity is located between the support member and a portion of the patient support which is supported by the linkage to reduce cantilever effects. An anneal of the layers may be performed to further increase the roughness. If the determined drift exceeds a predetermined threshold range, rebuilding the plurality of classifiers to include a second set of classifiers trained to recognize the unclassified customer support issue or sentiment.