Computer-implemented methods and apparatus for processing a graphical element that has an associated original type, including blending at least part of the graphical element and at least part of one or more other graphical elements to produce a transformed graphical element. Examples of these models include Hidden Markov Models, Latent Dirichlet Allocation models, and the like. The panel body has a bottom board and multiple side panels pivotally mounted around a perimeter of the bottom board. In turn, the positioner may vent some pressure from the actuator.